The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Your body is creating and killing about 2.4 million red blood cells per second.
17
Lurch, a Watusi bull, had the largest horns in the world.
32
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
There are so many kinds of apples that if you ate a new one everyday, it would take over 20 years to try them all.
34
The strangers in your dreams are actually people that you've seen in real life.
50