Tigers can see 6 times better at night than humans.
305
Enamel is hardest substance in the human body.
61
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
On average, there's 100 billion neurons in the human brain.
83
We share 70% of our DNA with a slug.
218
The human sigh acts as a physiological reset button.
23