Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
94
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
If the human eye was a digital camera, it would have 576 megapixels.
25
Tigers can see 6 times better at night than humans.
305
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 sigh acts as a physiological reset button.
23
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191