Cows moo, lions roar, and pigs oink. But for many years it's been assumed that, except for the occasional snort, giraffes spent most of their lives in a tight-lipped silence. New research from a group ...

We are familiar with many animal sounds – a lion’s roar, a dog’s bark, a parrot’s squawk – but what sound comes to mind when you think of a giraffe? The long-necked beasts make basic sounds like ...

When it’s late and humans aren’t around, giraffes do something rather unexpected: they hum. This behaviour had never before been documented until recently, when researchers recorded almost 1,000 hours ...