Every human spent about half an hour as a single cell.
144
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
Our brains have a negativity bias and will remember bad memories more than good ones.
15
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
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Babies crawl an average of 200m a day.
212
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139