The human brain uses approximately as much energy as a 10 watt light bulb.
120
Early American humans hunted car-size armadillos and used their shells for houses.
12
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
32
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Yawns are more contagious among people with closer relationships.
163
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132