Whales

The Detail: Euthanising a beached whale is an unpopular move. But sometimes trying to save it is worse.

If a stranded whale can't be saved, what is the next best option? An Australian engineer has set out to find a euthanasia solution capable of puncturing the animal kingdom's largest heart. Video

Beneath the surface of the Pacific record numbers of humpback whales make their way south on an annual migration - a population bouncing back from the 'brink of extinction' due to whaling.

Whales enjoy throwing seaweed on their heads and holding it in their mouths as makeshift toothbrushes or for play, new research from Australia suggests.