The largest cell in the human body is the female egg and the smallest is the male sperm.
682
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Our brains have a negativity bias and will remember bad memories more than good ones.
15
You forget 90% of your dreams.
256
If the human eye was a digital camera, it would have 576 megapixels.
25
Your heart will pump about 212 million liters in its lifetime.
26
Enamel is hardest substance in the human body.
61
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82