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Whether it's the genetic code, an ancient language, or patterns of light in a distant galaxy, scientists often have to play the role of decoder.

1 cent - $1 per group Ages 8 - 11 10 to 30 minutes
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Learners model the Sun-Earth-Moon system to show what causes the Moon's appearance to change when viewed from the Earth.

$1 - $5 per group Ages 8 - 11 10 to 30 minutes