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Are Some Species More Important Than Others?
Can an ecosystem survive without its keystone species?
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Why Does Every Animal Look Like This?
Countershading is everywhere, and it may be nature’s most successful form of camouflage.
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Glass is Solid… So Why Is It Clear?
Glass is made of sand, which is a kind of rock. But glass is transparent. We explore why!
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Why Are There 7 Days In a Week? Explained
Here’s the true story of one of the oldest human customs still in use today.