How much krill does a blue whale eat?

Blue whales are rare, magnificent and can weigh up to 136 tonnes, about the same as a semitrailer truck. Their food may be small, but their portions? Enormous.

Latest videos

Echidna love train

1:40
Video: Echidna love train

Bettongs: back from extinction

2:05
Video: Bettongs: back from extinction

Why snakes have fangs

1:28
Video: Why snakes have fangs