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Grade 5
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Exploring Space
The Planets That Aren't
Celestial Coincidence
What Causes the Tides?
Flights of Fancy: Leonardo's Flying Machines
Power Bites: Celestial “Black Out”
Stargazing with Jack Horkheimer
Firestorm: Weather on a Neutron Star
What makes stars appear to twinkle?
Try these simulations too:
What is the most common element in the universe?
Why aren't any single-celled organisms as big as you?
How fast does a stalactite grow?
