It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
By weight, Bone is five times stronger than steel.
417
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 human brain uses approximately as much energy as a 10 watt light bulb.
120
On average, there's 100 billion neurons in the human brain.
83
Only humans shed emotional tears.
331
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Human hair and fingernails continue to grow after death.
7