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      <MissionDesc>VISION: GREAT LAKES SCIENCE CENTER ENVISIONS A COMMUNITY WHERE ALL PEOPLE VALUE SCIENCE, TECHNOLOGY, ENGINEERING, AND MATH TO INFORM DECISION MAKING AND ENRICH LIVES.(CONTINUED ON SCHEDULE O)GUIDING PRINCIPLES: WE HELP PEOPLE LEARN STEM BY DOING STEM AND BELIEVE THAT IT IS BEST LEARNED THROUGH REAL SCIENTIFIC CHALLENGES. WE CULTIVATE CREATIVE, INNOVATIVE, CRITICAL THINKERS FOR THE 21ST CENTURY. WE SUPPORT A LEARNING CULTURE THAT ENCOURAGES CURIOSITY AND EXPERIMENTATION. WE BRING PEOPLE TOGETHER BY CREATING WELCOMING, FUN, AND HIGH-QUALITY GUEST EXPERIENCES. WE STRENGTHEN OUR COMMUNITY IMPACT BY COLLABORATING WITH OTHER ORGANIZATIONS AND CONNECTING TO STEM RESOURCES IN OUR REGION. WE ENSURE OUR FUTURE BY MAINTAINING OUR LONG-TERM FISCAL AND STAFF SUSTAINABILITY.</MissionDesc>
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      <Desc>EDUCATION: THE GREAT LAKES SCIENCE CENTER (GLSC) IS A COMMUNITY-FOCUSED, FORWARD-THINKING REGIONAL ASSET AND NORTHEAST OHIO'S LEADING SCIENCE AND TECHNOLOGY CENTER, OFFERING A WIDE ARRAY OF INNOVATIVE PROGRAMMING IN SERVICE OF ITS MISSION TO MAKE SCIENCE, TECHNOLOGY, ENGINEERING, AND MATH (STEM) COME ALIVE. EACH YEAR, GLSC'S EDUCATIONAL WORK ENSURES VISITORS COME TO GLSC TO EXPERIENCE NEW DEMONSTRATIONS, LEARN ABOUT EMERGING TECHNOLOGIES AND PARTICIPATE IN SEASONAL CAMPS, OUTREACH, AND COMMUNITY EVENTS THAT TEACH, INSPIRE, AND DEMONSTRATE STEM'S RELEVANCE IN OUR DAILY LIVES. GLSC IS ALSO HOME TO THE 9TH GRADE CLASS OF CLEVELAND METROPOLITAN SCHOOL DISTRICT'S (CMSD) AWARD-WINNING MC2STEM HIGH SCHOOL.(CONTINUED ON SCHEDULE O)GLSC LEVERAGES ITS UNIQUE POSITION TO BRIDGE THE WORKFORCE GAP AND INCREASE STUDENTS' INTEREST IN STEM BY PROVIDING AN OPPORTUNITY TO ENGAGE WITH SCIENCE CONCEPTS THROUGH INTERACTIVE PROJECTS THAT ENCOURAGE CREATIVITY AND EXPERIMENTATION. WORKSHOP ACTIVITIES HELP YOUTH SEE THEMSELVES AS STEM-CAPABLE AND BUILD THEIR CONFIDENCE TO BECOME FUTURE SCIENTISTS, ENGINEERS, AND INNOVATORS. UNIQUE PARTNERSHIPS WITH REGIONAL STEM INDUSTRIES ALLOW US PROVIDE ENGAGING LEARNING EXPERIENCES THAT ALIGN WITH CURRENT WORKFORCE NEEDS. NORTHEAST OHIO'S ECONOMIC DRIVERS INCLUDE MANUFACTURING, TECHNOLOGY, HEALTHCARE, ENGINEERING, ROBOTICS, SPACE AND MORE. EDUCATIONAL PROGRAMMING ENGAGES STUDENTS IN ACTIVITIES THAT NOT ONLY ALIGN WITH OHIO'S ACADEMIC CONTENT STANDARDS, BUT ALSO BUILD 21ST CENTURY SKILLS AND HELP STUDENTS DEVELOP CRITICAL SKILLS SUCH AS CREATIVITY AND PERSEVERANCE. CORE EDUCATIONAL PROGRAMS INCLUDE: GROW UP GREAT WITH SCIENCE, CLEVELAND CREATES 6 &amp; 7, CREATING CONNECTIONS 8, CAMP CURIOSITY, MANUFACTURING DAY, AND THE ROBOTICS INITIATIVE. GROW UP GREAT WITH SCIENCE PROVIDES STEM-BASED EDUCATION TO PRESCHOOLERS FROM LOW-INCOME CLEVELAND HOUSEHOLDS THROUGH PARTNERSHIPS WITH LOCAL HEAD START CENTERS, INCLUDING CATHOLIC CHARITIES, STARTING POINT, CMSD AND PNC FAIRFAX CONNECTION. PROGRAMMING REACHES CHILDREN THROUGH OUTREACH EXPERIENCES AND SCIENCE DEMONSTRATIONS IN THE CLASSROOM, FIELD EXPERIENCES TO THE SCIENCE CENTER AND PROFESSIONAL DEVELOPMENT FOR EDUCATORS.CLEVELAND CREATES 6 &amp; 7 (CC6/CC7) AND CREATING CONNECTIONS (CC8) SERVES ROUGHLY 3,500 MIDDLE SCHOOL STUDENTS AND 215 TEACHERS THROUGH A PARTNERSHIP WITH CLEVELAND METROPOLITAN SCHOOL DISTRICT (CMSD). THE PROGRAM SERVES ALL CMSD 6TH, 7TH, AND 8TH GRADE CLASSROOMS ACROSS 33 SCHOOLS. CC PROGRAMMING USES INQUIRY-BASED LEARNING AND INTERACTIVE CHALLENGES THAT TEACH THE ENGINEERING DESIGN PROCESS, REINFORCE STEM CONCEPTS, AND ENCOURAGE CREATIVITY, EXPERIMENTATION, PERSEVERANCE, AND SELF-EFFICACY AMONG STUDENTS. CC6 ALIGNS WITH CLASSROOM CURRICULUM ON RENEWABLE ENERGY. STUDENTS EXPLORE HYDRO-POWER SOLUTIONSBY CREATING A WATER WHEEL AND EXPLORE VARIABLES AND ITERATE TO INCREASE THEIR ENERGY OUTPUT. CC7 INCLUDES A CIRCUITRY WORKSHOP WHERE STUDENTS BUILD WORKING FLASHLIGHTS USING COPPER TAPE, A BATTERY, AND LED LIGHT. CC8 INTRODUCES EMERGING TECHNOLOGIES, INCLUDING BLOCKCHAIN, CODING, INDUSTRIAL INTERNET OF THINGS (IIOT), CYBERSECURITY, AND DATE PROTECTION, INTRODUCING THEM TO THE DIGITAL CAREER LANDSCAPE. ALL WORKSHOPS INCLUDE AN INTERACTIVE SCIENCE SHOW AS WELL AS A TAKE-HOME KIT TO BUILD, DESIGN, AND REWORK THE PROJECT WITH THEIR SIBLINGS, FRIENDS OR FAMILY MEMBERS. FAMILY AND FRIENDS ARE ALSO INVITED TO SPEND A DAY AT GLSC AT NO COST, PROVIDING ACCESS FOR THE ENTIRE HOUSEHOLD TO ENGAGE IN STEM LEARNING EXPERIENCES. THIS IS JUST ONE OF OUR SCHOOL PARTNERSHIPS THAT REACHED 60,981 STUDENTS IN 2-23, HALF COMING FROM TITLE I-ELIGIBLE SCHOOLS, AND AN ADDITIONAL 5,000 STUDENTS IN OUTREACH PROGRAMMING.CAMP CURIOSITY ENGAGES STUDENTS FROM K-6TH GRADE IN FUN, INQUIRY-BASED, ACTIVE LEARNING CENTERED ON THE INVESTIGATION AND RESOLUTION OF MESSY REAL-WORLD PROBLEMS. ALL CAMPS ARE SEPARATED BY AGE, AND CURRICULUM CONTENT IS TAILORED TO THE AGE GROUP. ONE-DAY CAMPS ARE OFFERED DURING WINTER BREAK WHILE SUMMER CAMPS PROVIDE WEEK-LONG IMMERSIVE EXPERIENCES OF STEM FUNDAMENTALS. FROM CHEMISTRY, TO PHYSICS, ROBOTICS, EMERGING TECHNOLOGIES, AND ENGINEERING, CAMPERS WILL HAVE THE CHANCE TO SEE HOW STEM IS PART OF THEIR EVERYDAY LIVES. CAMPER REGISTRATIONS FOR 2023 TOPPED 2,400, WITH OVER 1,600 CAMPERS JOINING US FOR SUMMER 2023. MORE THAN 10% OF ALL ENROLLED SUMMER CAMPERS ATTENDED ON SCHOLARSHIP THAT INCLUDES BEFORE- AND AFTER-CARE, TWO MEALS, AND SNACKS.MANUFACTURING DAY IS A LARGE-SCALE EVENT INCREASING STUDENTS' AWARENESS OF MANUFACTURING-RELATED CAREERS AND THE SKILLS THAT INDUSTRY LEADERS NEED. MANUFACTURING DAY 2023 SERVED NEARLY 600 STUDENTS WITH INTERACTIVE COMPANY-LED STEM ENGAGEMENT ACTIVITIES, MENTOR LUNCH, CAREER PANELS AND OUTREACH FROM EDUCATIONAL PARTNERS WITH THE HELP OF OVER 200 CORPORATE VOLUNTEERS.ROBOTICS INITIATIVE IS A YEAR-ROUND AFTERSCHOOL PROGRAM THAT SUPPORTS SIX CMSD HIGH SCHOOL TEAMS (INCLUDING THE FIRST ALL-GIRL, DISTRICT-WIDE TEAM) WITH MENTORSHIP, CURRICULUM, TOOLS, AND RESOURCES TO PARTICIPATE IN FIRST ROBOTICS COMPETITION. THESE TEAMS ARE COMPRISED OF MORE THAN 100 TRADITIONALLY UNDERSERVED AND UNDERREPRESENTED STUDENTS, INCREASING EQUITY AND ACCESS FOR CLEVELAND'S YOUTH TO PARTICIPATE WITH RESOURCES THAT RIVAL THE BEST SUBURBAN TEAMS. FIRST ROBOTICS ENCOURAGES A CULTURE OF TEAMWORK AND INCLUSION, ALLOWING STUDENTS TO BUILD A ROBOUST COMMUNITY. THEY WORK WITH THEIR PEERS AND MENTORS TO MASTER NEW SKILLS, ENHANCE THEIR EMPLOYABILITY, AND DEVELOP A LIFE-LONG LOVE OF STEM. THIS YEAR THESE NOVICE TEAMS NOT ONLY MADE IT TO PLAYOFF ROUNDS, BUT ALSO BROUGHT HOME AWARDS, INCLUDING A REGIONAL JUDGES AWARD AND 2ND PLACE WITH THEIR ALLIANCE PARTNERS AT THE OHIO STATE CHAMPIONSHIP. THE YEAR-ROUND PROGRAM INCLUDES SUMMER LEARNING, WITH PAID INTERNSHIPS AND THE PROSTHETICS INITIATIVE, WHERE STUDENTS DESIGN AND BUILD 3-D PRINTED PROSTHETICS FOR CHILDREN IN NEED. IN 2023, STUDENTS CREATED AND DELIVERED PROSTHETIC HANDS AND ARMS TO ECUADOR, IN COLLABORATION WITH THE HUMANITARIAN AGENCY IMAHELPS.</Desc>
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        <Desc>EXHIBITS: IN ADDITION TO HUNDREDS OF HANDS-ON EXHIBITS AND TEMPORARY EXHIBITIONS, GLSC IS THE HOME OF THE NASA GLENN VISITOR CENTER, THE STEAMSHIP WILLIAM G. MATHER, AND THE CLEVELAND CLINIC DOME THEATER, WHILE UNDERTAKING LARGE INVESTMENTS FOR THE NEW CLEVELAND CREATES GALLERY AND EARLY CHILDHOOD AND WATER TECHNOLOGY EXHIBITS CURRENTLY IN DEVELOPMENT. NASA GLENN VISITOR CENTER, ONE OF ONLY 11 CONGRESSIONALLY DESIGNATED NASA VISITOR CENTERS IN THE COUNTRY, ALLOWS VISITORS TO EXPERIENCE SPACE THROUGH IMAGES, INTERACTIVE EXHIBITS, FASCINATING ARTIFACTS, AND A VAST COLLECTION OF NASA MEDIA. (CONTINUED ON SCHEDULE O)2023 MARKED THE 50TH ANNIVERSARY OF GLSC'S APOLLO COMMAND MODULE FROM THE SKYLAB 3 MISSION. GLSC'S NASA GLENN VISITOR CENTER FEATURES THIS RARE ARTIFACT, ONE OF ONLY 15 APOLLO MODULES ON DISPLAY THROUGHOUT THE COUNTRY. DURING THE PUBLIC CELEBRATION WEEKEND GLSC REUNITED THE PILOT, COL. JACK LOUSMA WITH HIS VEHICLE 50 YEARS AFTER HE CLIMBED OUT OF THE MODULE AFTER IT SPLASHED DOWN IN THE PACIFIC OCEAN. THROUGHOUT THE SUMMER GLSC CELEBRATED THE MISSION'S ANNIVERSARY WITH UNIQUE EDUCATIONAL PROGRAMS AND ACTIVITIES, CULMINATING IN A FREE DAY AND GALA TRIBUTE. SPECIAL PROGRAMS ALLOWED VISITORS TO HEAR COL. LOUSMA REMINISE ABOUT THE MISSION, ANSWER QUESTIONS, AND GREET THE PUBLIC. FOR THE GALA, NASA ASTRONAUT COL. DOUG WHEELOCK INTERVIEWED COL. LOUSMA ABOUT HIS LANDMARK CAREER IN SPACE EXPLORATION.SCIENCE PHENOMENA OFFERS MORE THAN 90 INTERACTIVE EXPERIENCES THAT DEMONSTRATE THE WONDERS OF SCIENCE. VISITORS ENGAGE WITH CLASSIC EXPERIMENTS LIKE PHOTOLUMINESCENCE IN THE SHADOW ROOM, AND NEW ACTIVE PROLONGED ENGAGEMENT EXHIBITS LIKE DERBY DASH. OTHER NEW EXHIBIT ELEMENTS INCLUDE THE NORTHEAST OHIO SCIENCE AND ENGINEERING FAIR PERIODIC TABLE EXHIBIT AND THE NORTHEAST OHIO PUBLIC ENERGY COUNCIL WIND TURBINE EXHIBIT. BIOMEDTECH GALLERY PROVIDES INTERACTIVE EXHIBITS, VIDEOS, AND EDUCATIONAL DISPLAYS FOCUSING ON GENOMICS, STEM CELLS, PROSTHETICS, FUNCTIONAL ELECTRICAL STIMULATION (FES), AND MEDICAL IMAGING, HELPING STUDENTS UNDERSTAND HOW THESE TECHNOLOGIES ADVANCE HEALTH AND IMPROVE LIVES. OUTDATED MATERIALS WERE REMOVED TO MAINTAIN RELEVANCY. POLYMER FUN HOUSE IS A SPECIAL AREA OF THE SCIENCE PHENOMENON GALLERIES THAT IS GEARED FOR OUR YOUNGEST GUESTS. IN THE FUN HOUSE, GUESTS AGE 7 AND YOUNGER HAVE THEIR OWN AREA TO EXPLORE BASIC SCIENCE PRINCIPLES THROUGH OPEN ENDED PLAY. THE AREA ALSO INCLUDES THE SEASONAL OUTDOOR EXHIBIT PORT POLYMER AND A SPECIAL INFANT AREA. STEAMSHIP WILLIAM G. MATHER GIVES VISITORS A GLIMPSE OF LIFE ON BOARD A WORKING GREAT LAKES FREIGHTER, THROUGH THE RESTORED 618-FOOT HISTORIC FLAGSHIP OF CLEVELAND-CLIFFS IRON COMPANY. SELF-GUIDED TOURS ALLOW VISITORS TO STEP BACK IN TIME TO EXPLORE THE SHIP THAT BUILT CLEVELAND. THE FUTURE CLEVELAND CREATES GALLERY WENT INTO FABRICATION WITH A RIBBON CUTTING SCHEDULED FOR FEBRUARY 2024. THE GALLERY WILL FEATURE EMERGING TECHNOLOGIES IN NORTHEAST OHIO IN AN ADA-COMPLIANT, MULTI-LINGUAL SPACE, PROVIDING HANDS-ON EXPERIENCES AS WELL AS INTRODUCTIONS TO BIG DATA, SMART MANUFACTURING, ARTIFICIAL INTELLIGENCE, AND INTERNET OF THINGSTO VISITORS AND FAMILIES, PRESENTING A PATH TO THE OPPORTUNITIES OF TOMORROW BY DEVELOPING SKILLS, GROWING CURIOSITY, AND ENCOURAGING EXPLORATION OF NORTHEAST OHIO'S GROWING STEM FIELDS. TWO NEW LEARNING SPACES WERE CREATED TO CONTINUE TO SERVE STUDENTS AND YOUNG PEOPLE IN STEM LEARNING AND WORKFORCE DEVELOPMENT. THE ROCKWELL AUTOMATION ROBOTICS ROOM IS HOME OF OUR ROBOTICS INITIATIVE. THE TRANSDIGM LEARNING CENTER IS A HIGHLY-FLEXIBLE MULTI-PURPOSE SPACE USED FOR STUDENT WORKSHOPS, CAMP CURIOSITY SESSIONS, AND THE ROBOTICS INITIATIVE.THERE WERE TWO TEMPORARY EXHIBITS THAT WERE PRESENTED IN 2023. THE FIRST WAS CURIOUS GEORGE: LET'S GET CURIOUS! WHICH PROVIDED AN ENGAGING STEM EXPERIENCE FOR YOUTH AND THEIR CAREGIVERS. KEY CONCEPTS IN SCIENCE, TECHNOLOGY, ENGINEERING AND MATH WERE WOVEN AND LAYERED THROUGHOUT THE EXHIBITION. IMMERSIVE EXPERIENCES IN CURIOUS GEORGE'S ICONIC WORLD PROMOTED THE USE OF INQUIRY SKILLS AND HANDS-ON PROBLEM SOLVING, MAKING CHILDREN'S THINKING VISIBLE. DINOSAURS OF THE SAHARA WAS THE SUMMER 2023 TEMPORARY EXHIBITION, A WORLD PREMIERE THAT BROUGHT ORIGINAL FOSSILS FROM THE SAHARA, INCLUDING A 32-FOOT LONG-NECKED JOBARIA SKELETON, AN INTERACTIVE DINOSAUR DIG SITE, AND THE NEW RELEASE OF FOOTAGE FROM PALEONTOGIST PAUL SERENO'S GROUNDBREAKING SAHARAN DESERT EXPEDITIONS.</Desc>
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        <Desc>GREAT LAKES SCIENCE CENTER CONTINUES TO MAKE THE MOST OF ITS RESOURCES AND BUDGET TO FURTHER THE MISSION AND GOALS FOR THE MEMBERSHIP AND MARKETING DEPARTMENTS. USING A MODERN, DATA-INFORMED DECISION-MAKING PROCESS, THE SCIENCE CENTER'S MARKETING DEPARTMENT DIVIDES ITS BUDGET, RESOURCES, AND TIME IN A NIMBLE AND EVOLVING MIX OF EARNED, OWNED, AND PAID MEDIA INITIATIVES, DESIGNED TO REACH CORE AND SPECIALLY-IDENTIFIED AUDIENCES RELIABLY AND EFFICIENTLY. USING A COMBINATION OF TARGETED DIGITAL ADS, SEARCH ENGINE MARKETING, SEARCH ENGINE OPTIMIZATION, SOCIAL MEDIA ADVERTISING, STREAMING VIDEO ADS, AND TRADITIONAL BROADCAST AND PRINT OUTLETS, (CONTINUE ON SCHEDULE O)THE SCIENCE CENTER CONTINUES ITS RECOVERY FROM THE COVID ERA, BY RE-ESTABLISHING THE MUSEUM AS PREMIERE DESTINATION FOR FAMILIES. GLSC CENTER SERVED 5,901 MEMBER HOUSEHOLDS IN FY23, INCLUDING 2,300 NEW MEMBERS, AND 231 WHO HAVE BEEN MEMBERS FOR MORE THAN 25 YEARS. GLSC WELCOMED 279,362 VISITORS, INCLUDING 96,498 FREE VISITORS, A 70 PERCENT INCREASE IN FREE VISITS FROM FY22, AND A 20 PERCENT INCREASE IN TOTAL VISITORS FROM FY22. THERE WAS NO SHORTAGE OF EXCITING EVENTS AND INITIATIVES FOR THE MARKETING DEPARTMENT TO SHARE WITH MEDIA, VISITORS, AND SOCIAL MEDIA FOLLOWERS, ESPECIALLY THE ANNOUNCEMENTS AND MEDIA PREVIEWS THAT WERE DONE IN ADVANCE OF THE PLANNED TOTAL ECLIPSE FEST FOR FY24. THE SCIENCE CENTER'S ROBOTICS INITIATIVE, THE WORLD PREMIERE OF THE DINOSAURS OF THE SAHARA EXHIBITION, AND THE 50TH ANNIVERSARY OF OUR APOLLO COMMAND MODULE'S MISSION TO SKYLAB HELPED GENERATE EXCEPTIONAL AMOUNTS OF EARNED MEDIA COVERAGE.</Desc>
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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>THOMAS P'SIMER</PersonNm>
        <TitleTxt>INDIV TRUSTEE OR DIRECTOR</TitleTxt>
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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>TERRELL H PRUITT</PersonNm>
        <TitleTxt>INDIV TRUSTEE OR DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>LARESE PURNELL</PersonNm>
        <TitleTxt>INDIV TRUSTEE OR DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>LINDA RAE</PersonNm>
        <TitleTxt>INDIV TRUSTEE OR DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DAVID REYNOLDS</PersonNm>
        <TitleTxt>INDIV TRUSTEE OR DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MICHAEL F RIPICH</PersonNm>
        <TitleTxt>INDIV TRUSTEE OR DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>LAURENCE A SIVIC</PersonNm>
        <TitleTxt>INDIV TRUSTEE OR DIRECTOR</TitleTxt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JAMES SLATER</PersonNm>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DOUGLAS H SMITH</PersonNm>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DEREK SPENCER</PersonNm>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DIANA P STRONGOSKY</PersonNm>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MARVIN A THOMAS</PersonNm>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>LISA WARD</PersonNm>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <TotalReportableCompFromOrgAmt>621286</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
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      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
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      <TotalContributionsAmt>5407899</TotalContributionsAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>FACILITY RENTALS</Desc>
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      <ContriRptFundraisingEventAmt>230725</ContriRptFundraisingEventAmt>
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      <NetIncmFromFundraisingEvtGrp>
        <TotalRevenueColumnAmt>-56829</TotalRevenueColumnAmt>
        <ExclusionAmt>-56829</ExclusionAmt>
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        <Desc>PARKING GARAGE</Desc>
        <BusinessCd>531390</BusinessCd>
        <TotalRevenueColumnAmt>665634</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>665634</RelatedOrExemptFuncIncomeAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueMiscGrp>
        <Desc>CONCESSIONS &amp; OTHER</Desc>
        <BusinessCd>722210</BusinessCd>
        <TotalRevenueColumnAmt>243924</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>243924</RelatedOrExemptFuncIncomeAmt>
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      <OtherRevenueMiscGrp>
        <Desc>STORE REVENUE</Desc>
        <BusinessCd>459420</BusinessCd>
        <TotalRevenueColumnAmt>116692</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>116692</RelatedOrExemptFuncIncomeAmt>
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      <MiscellaneousRevenueGrp>
        <TotalRevenueColumnAmt>11674</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>11674</RelatedOrExemptFuncIncomeAmt>
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      <OtherRevenueTotalAmt>1037924</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>9716478</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>4102017</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>206562</ExclusionAmt>
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      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>322596</TotalAmt>
        <ProgramServicesAmt>253306</ProgramServicesAmt>
        <ManagementAndGeneralAmt>27789</ManagementAndGeneralAmt>
        <FundraisingAmt>41501</FundraisingAmt>
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      <OtherSalariesAndWagesGrp>
        <TotalAmt>2595045</TotalAmt>
        <ProgramServicesAmt>2033552</ProgramServicesAmt>
        <ManagementAndGeneralAmt>219911</ManagementAndGeneralAmt>
        <FundraisingAmt>341582</FundraisingAmt>
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      <OtherEmployeeBenefitsGrp>
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        <ProgramServicesAmt>336637</ProgramServicesAmt>
        <ManagementAndGeneralAmt>41337</ManagementAndGeneralAmt>
        <FundraisingAmt>43495</FundraisingAmt>
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      <PayrollTaxesGrp>
        <TotalAmt>219821</TotalAmt>
        <ProgramServicesAmt>175209</ProgramServicesAmt>
        <ManagementAndGeneralAmt>17287</ManagementAndGeneralAmt>
        <FundraisingAmt>27325</FundraisingAmt>
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        <ProgramServicesAmt>1578</ProgramServicesAmt>
        <ManagementAndGeneralAmt>4664</ManagementAndGeneralAmt>
        <FundraisingAmt>3157</FundraisingAmt>
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      <FeesForServicesAccountingGrp>
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        <ManagementAndGeneralAmt>51738</ManagementAndGeneralAmt>
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      <FeesForSrvcInvstMgmntFeesGrp>
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        <ManagementAndGeneralAmt>25810</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>420527</ProgramServicesAmt>
        <ManagementAndGeneralAmt>30593</ManagementAndGeneralAmt>
        <FundraisingAmt>63600</FundraisingAmt>
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      <AdvertisingGrp>
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        <ProgramServicesAmt>330373</ProgramServicesAmt>
        <ManagementAndGeneralAmt>42422</ManagementAndGeneralAmt>
        <FundraisingAmt>10076</FundraisingAmt>
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      <OfficeExpensesGrp>
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        <ProgramServicesAmt>24998</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2925</ManagementAndGeneralAmt>
        <FundraisingAmt>3691</FundraisingAmt>
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      <InformationTechnologyGrp>
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        <ProgramServicesAmt>125796</ProgramServicesAmt>
        <ManagementAndGeneralAmt>14161</ManagementAndGeneralAmt>
        <FundraisingAmt>37829</FundraisingAmt>
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        <ProgramServicesAmt>573689</ProgramServicesAmt>
        <ManagementAndGeneralAmt>50995</ManagementAndGeneralAmt>
        <FundraisingAmt>12749</FundraisingAmt>
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      <TravelGrp>
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        <ProgramServicesAmt>35958</ProgramServicesAmt>
        <ManagementAndGeneralAmt>393</ManagementAndGeneralAmt>
        <FundraisingAmt>786</FundraisingAmt>
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      <ConferencesMeetingsGrp>
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        <ProgramServicesAmt>6389</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3216</ManagementAndGeneralAmt>
        <FundraisingAmt>2516</FundraisingAmt>
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      <InterestGrp>
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        <ManagementAndGeneralAmt>14648</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>1634116</ProgramServicesAmt>
        <ManagementAndGeneralAmt>145254</ManagementAndGeneralAmt>
        <FundraisingAmt>36314</FundraisingAmt>
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        <ProgramServicesAmt>139612</ProgramServicesAmt>
        <ManagementAndGeneralAmt>12410</ManagementAndGeneralAmt>
        <FundraisingAmt>3102</FundraisingAmt>
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        <ProgramServicesAmt>406051</ProgramServicesAmt>
        <ManagementAndGeneralAmt>89079</ManagementAndGeneralAmt>
        <FundraisingAmt>311708</FundraisingAmt>
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      <OtherExpensesGrp>
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        <ProgramServicesAmt>443830</ProgramServicesAmt>
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        <FundraisingAmt>0</FundraisingAmt>
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      <OtherExpensesGrp>
        <Desc>THEATRE &amp; EXHIBITS</Desc>
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        <ProgramServicesAmt>361190</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
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      <OtherExpensesGrp>
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        <TotalAmt>133231</TotalAmt>
        <ProgramServicesAmt>110539</ProgramServicesAmt>
        <ManagementAndGeneralAmt>17499</ManagementAndGeneralAmt>
        <FundraisingAmt>5193</FundraisingAmt>
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      <TotalFunctionalExpensesGrp>
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        <ProgramServicesAmt>7413350</ProgramServicesAmt>
        <ManagementAndGeneralAmt>812133</ManagementAndGeneralAmt>
        <FundraisingAmt>944624</FundraisingAmt>
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      <JointCostsInd>X</JointCostsInd>
      <CashNonInterestBearingGrp>
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        <EOYAmt>1461890</EOYAmt>
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      <SavingsAndTempCashInvstGrp>
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        <EOYAmt>1731649</EOYAmt>
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        <EOYAmt>1235144</EOYAmt>
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        <EOYAmt>364881</EOYAmt>
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        <EOYAmt>237771</EOYAmt>
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      <LandBldgEquipAccumDeprecAmt>51458480</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
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        <EOYAmt>24535461</EOYAmt>
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      <InvestmentsPubTradedSecGrp>
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        <EOYAmt>5081331</EOYAmt>
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        <EOYAmt>34648127</EOYAmt>
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        <EOYAmt>575268</EOYAmt>
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        <EOYAmt>767889</EOYAmt>
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        <EOYAmt>150181</EOYAmt>
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        <EOYAmt>543062</EOYAmt>
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      <TotalLiabilitiesGrp>
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        <EOYAmt>2036400</EOYAmt>
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      <DonorRestrictionNetAssetsGrp>
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        <EOYAmt>32611727</EOYAmt>
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      <TotLiabNetAssetsFundBalanceGrp>
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        <EOYAmt>34648127</EOYAmt>
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      <NetUnrlzdGainsLossesInvstAmt>351787</NetUnrlzdGainsLossesInvstAmt>
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      <InfoInScheduleOPartXIIInd>X</InfoInScheduleOPartXIIInd>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
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      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
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    <IRS990ScheduleA documentId="RetDoc1039100001">
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        <CurrentTaxYearMinus3YearsAmt>2384070</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>5469195</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>4598025</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>5407899</CurrentTaxYearAmt>
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        <CurrentTaxYearMinus1YearAmt>4598025</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>5407899</CurrentTaxYearAmt>
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        <CurrentTaxYearMinus3YearsAmt>195845</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>184225</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>184765</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>263391</CurrentTaxYearAmt>
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        <CurrentTaxYearMinus3YearsAmt>563706</CurrentTaxYearMinus3YearsAmt>
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        <FormAndLineReferenceDesc>PART III, LINE 1A:</FormAndLineReferenceDesc>
        <ExplanationTxt>ON LOAN FROM THE SMITHSONIAN: SKYLAB 3 MODULE, SPACE SUITS, SKYLAB MODEL ON LOAN FROM THE JOHNSON SPACE CENTER: MOON ROCK ON LOAN FROM NASA JET PROPULSION LABORATORY: OPPORTUNITY TEST LANDING BAGS ON LOAN FROM NASA GLENN RESEARCH CENTER: SHUTTLE WIND TUNNEL MODEL</ExplanationTxt>
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        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PURPOSE OF THE ENDOWMENT IS TO PROVIDE A FINANCIAL SUPPLEMENT TO THE OPERATING AND CONTRIBUTED INCOME OF THE SCIENCE CENTER IN THE FUTURE, AND TO SERVE AS AN ADDITIONAL SOURCE OF FUNDING FOR EMERGENCY NEEDS SHOULD UNANTICIPATED CIRCUMSTANCES DEVELOP WHICH WOULD ADVERSELY IMPACT THE FINANCIAL POSITION (OPERATING OR CAPITAL) OF THE SCIENCE CENTER.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SCIENCE CENTER IS TAX-EXEMPT, UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE OF 1986. NO PROVISION FOR FEDERAL INCOME TAXES HAS BEEN REPORTED IN ITS FINANCIAL STATEMENTS. THE SCIENCE CENTER HAS NOT BEEN CLASSIFIED AS AN ORGANIZATION THAT IS A "PRIVATE FOUNDATION" WITHIN THE MEANING OF SECTION 509(A) OF THE IRC. IN ACCORDANCE WITH THE "INCOME TAXES" TOPIC OF THE FASB ASC, UNCERTAIN INCOME TAX POSITIONS ARE EVALUATED AT LEAST ANNUALLY BY MANAGEMENT. ANY PENALTIES AND INTEREST WOULD BE SHOWN AS INCOME TAX EXPENSE ON THE STATEMENT OF FUNCTIONAL EXPENSES. AS OF SEPTEMBER 30, 2023, THE SCIENCE CENTER HAS IDENTIFIED NO UNCERTAIN INCOME TAX POSITIONS AND HAS INCURRED NO AMOUNTS FOR INCOME TAX PENALTIES AND INTEREST FOR THE YEAR THEN ENDED. THE SCIENCE CENTER FILES ITS FEDERAL FORM 990 IN THE U.S. FEDERAL JURISDICTION AND A STATE REGISTRATION AT THE OFFICE OF THE STATE'S ATTORNEY GENERAL FOR THE STATE OF OHIO.</ExplanationTxt>
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        <ExplanationTxt>SPECIAL EVENT EXPENSES 56,829. LOSS ON WRITE-OFF OF PROPERTY AND EQUIPMENT 468.</ExplanationTxt>
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