After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
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
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Only humans shed emotional tears.
331
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11