In one study, bees when shown two cards were able to identify cards that had more or less dots on them.
There's proof that until the 17th century, people's natural sleep patterns were to sleep when it first got dark, wake up for a few hours, and then have another extended sleep.
In 1953, a macaque monkey named Imo made an important discovery: washing her food.
Tyndall formed a boys club at an agricultural school in England. The club secretary kept a notebook listing questions the boys wanted to know more about.
How do animals express their emotions? Find out on this Moment of Science.