On average, there's 100 billion neurons in the human brain.
83
Mushrooms are more closely related to humans than they are to plants.
47
Babies crawl an average of 200m a day.
212
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Enamel is hardest substance in the human body.
61