Enamel is hardest substance in the human body.
61
One human hair can support 3 ounces.
191
Our brains have a negativity bias and will remember bad memories more than good ones.
15
Tigers can see 6 times better at night than humans.
305
The human brain uses approximately as much energy as a 10 watt light bulb.
120
You forget 90% of your dreams.
256
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132