Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
There are about 255 babies born worldwide every minute.
46
You forget 90% of your dreams.
256
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Human hair and fingernails continue to grow after death.
7
The human brain uses approximately as much energy as a 10 watt light bulb.
120
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13