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When is public transport free in Paris? When pollution gets out of hand

Meet the gray jay, Canada's new national bird

Stores dim the lights, quiet down for autistic shoppers

How safe are e-cigarettes?

Dog needs to work on his disappearing act

Why wild giraffes are suffering a 'silent extinction'

The Krampus is coming (and he's got a paddle)

Like bees of the sea, plankton pollinate plants

Science has measured all of humanity's 'stuff' and it's absolutely enormous

Montreal's pit bull ban goes into effect

Meet SALTO, the tiny robot that jumps better than you

Can we benefit from the omega-3s in insects?