The elephant brain weighs about 6,000g.
274
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5
There's a rare breed of pig that looks like a sheep.
14
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Two dogs were among the Titanic survivors.
262