Cows can sleep standing up, but they can only dream lying down.
745
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
The human brain doesn't stop developing until about 25 years old.
102
Gorillas can catch human colds and other illnesses.
205
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82