Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
A group of pugs is called a grumble.
10
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Cats and dogs can hear ultrasound.
350
A dog's naked behind leaves absolutely no bacteria when pressed against carpet.
250
The reindeer is the only mammal that can see UV light.
17