One human hair can support 3 ounces.
191
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
On average, there's 100 billion neurons in the human brain.
83
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Our brains have a negativity bias and will remember bad memories more than good ones.
15
Enamel is hardest substance in the human body.
61