by How It Works Team · 07/10/2010
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What is the maximum distance the human eye can see if unobstructed?
What are a hedgehog’s spines made of?
Why do we eat chocolate eggs at Easter?
Why did the sabre-toothed cats go extinct?
Why are most people right-handed?
What is orange juice ‘from concentrate’?
Why does polar bear fur sometimes look yellow or green?
Did American football derive from rugby?
Why does cling film cling?
What were the Salem witch trials?
Does space have a sound?
How did the sun form?
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