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    NSBRI
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    This is an activity (located on page 131 of the PDF) related to sleep and circadian rhythms as well as space travel. Learners will discover how the light/dark cycle is dictated by the rotation of...

    free Ages 8 - 18 45 to 60 minutes
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    In this activity about the heart (on page 22 of the PDF), learners examine sheep or chicken hearts to learn about the heart's structure and the flow of blood through the heart. Learners will...

    $10 - $20 per group Ages 8 - 14 45 to 60 minutes