蜜芽传媒

Geneticists have discovered there are four types of giraffe.

It was previously thought there was only one species of the world's tallest mammal.

Axel Janke is a scientist from Goethe University who made the discovery. He told 蜜芽传媒 Radio 4's PM that the differences are quite distinct.

(Photo: Giraffe Credit: Getty Images)