The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
There are about 255 babies born worldwide every minute.
46
On average a woman has 4 sexual partners in her lifetime.
-143
Your thumb is about the same size as your nose.
124
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13