The cat brain weighs about 30g.
167
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82
The seahorse is the only fish to have a neck.
12
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Queen ants have one of the longest life-spans of any known insect - typically up to 30 years. Western harvester ant queens can live up to 40 years!
2