Cats recognise the voice of their owner, but never evolved to care.
22
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
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
Condoms were originally made of animal intestines or linen.
347
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
The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
492
Female kangaroos have three vaginas.
2