Mushrooms are more closely related to humans than they are to plants.
47
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
You can't tickle yourself.
29
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Early American humans hunted car-size armadillos and used their shells for houses.
12
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
Human hair and fingernails continue to grow after death.
7