and flat teeth shaped like spades. They’re also much smaller overall. The smallest porpoise species, the vaquita, only ...

Nature has a fascinating way of creating creatures that appear strikingly similar yet are distinctly different. It's easy to ...

That was, until 2006 when the Baiji dolphin was declared “functionally extinct”. Its close cousin – the finless porpoise – known for its mischievous smile, has 15 years until it too could become ...