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Sleeping at night is actually unusual for mammals, and more than two thirds only become active after the sun has set. But many mammals have, with superpower senses, become masters of the shadows. Today, some are even returning to the dark side as their daytime world gets more and more crowded.

Check out all the latest animal and nature quizzes, clips and more from across the ´óÏó´«Ã½ on our Nature on C´óÏó´«Ã½ page!

Don't miss brand-new episodes of Sir David Attenborough'sÌýMammals on ´óÏó´«Ã½ One at 7pmÌýevery SundayÌýand catch up on ´óÏó´«Ã½ iPlayer!