Does the fastest tennis serve depend on height?

Does the fastest tennis serve depend on height?

With the Aussie Open here again, Rhett Allain investigates...
What's in a nerve?

What's in a nerve?

Planet Science investigates nerve cells
Fear of heights

Fear of heights

Do you have acrophobia?
Oh no...sprouts!

Oh no...sprouts!

It's everyone's least favourite Christmas food, but if you don't like them, you can blame your genes!

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