9 February 2012 Last updated at 05:01

Why zebras evolved their stripesZebra (Equus grevyi) (c) Journal of Experimental Biology

A zebra's unmistakeable stripes may have evolved to make the animals unattractive to blood-sucking flies, say scientists.


Right whale near ship. Image: New England AquariumWhales 'stressed by ocean noise'

A study of hormones in whale faeces shows that right whales are stressed by propeller noise from shipping. BBC News

Mushroom coral (c) Pim Bongaerts Corals inflate to escape the sand

Time-lapse footage reveals how mushroom corals inflate and deflate to free themselves from smothering sand.

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Frozen Planet season

  • GlacierFrozen Planet

    Frozen Planet takes you on the ultimate polar expedition, bringing to the screen the Arctic and Antarctic as you have never seen them before, and may never see them again...

  • The wolves close in for the kill (c) BBCEpic wolf hunt

    The extraordinary endurance hunting of grey wolves


  • Reclusive hunter

    The great grey owl travels the frozen taiga in search of prey

  • 'Criminal' penguins

    An Adelie penguin is captured on camera stealing stones from its neighbour's nest

  • Amazing orca hunt

    A film crew captures footage of what could be the most sophisticated animal hunt known

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