Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Only 3% of bird species have penises.
0
The seahorse is the only fish to have a neck.
12
A group of unicorns is called a blessing.
304
A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
12
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
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9