Roosters can't crow if they can't fully extend their necks.
28
We share 70% of our DNA with a slug.
218
An ant brain has about 250 000 brain cells. A human brain has 10,000 million so a colony of 40,000 ants has collectively the same size brain as a human.
118
All bonobo chimpanzees are bisexual!
29
The Giant South African Earthworm can grow up to 22 feet long and 1 inch in thick.
37
On average, it takes 660 days from conception for an elephant to give birth.
19