When in love, the human brain consistently releases the same combination of neurotransmitters and hormones that is released by amphetamines, leading to side effects such as increased heart rate, loss of appetite and sleep, and an intense feeling of excitement.
For those who have trouble sleeping researchers say that 1 week of camping, without electronics, resets our biological body clock and synchronizes our melatonin hormones with sunrise and sunset.
The same parasympathetic system that commands your colon to go to the bathroom, is also the same system that controls your tears. Sometimes, these signals get crossed which is why some people shed tears when they poop.
If your second toe is longer than your big toe it is a condition called Morton’s Toe. Some statues, including the Statue of Liberty, have feet sculpted that way.
Human fingers can feel objects as small as 13 nanometers. “This means that, if your finger was the size of the Earth, you could feel the difference between houses from cars.”
The human eye is sensitive enough that – assuming a flat Earth and complete darkness – you could spot a candle flame flickering up to 30miles (48 km) away.
There was a dutch man born in 1912, Mirin Dajo, who willingly had an actual sword thrust through his body multiple times without organ damage. He was taught this method by Indian mystics and performed it in public.
Aristotle believed the heart provided the ability to think, and the brain was just a heat sink for the heart.
Humans are bioluminescent. However, the light emitted by the body is 1000 times weaker than our eyes can pick up.
You can make beer in your gut. A man’s intestinal tract was acting like his own internal brewery. The patient had an infection with saccharomyces cerevisiae. So when he ate or drank a bunch of starch — a bagel, pasta or even a soda — the yeast fermented the sugars into ethanol, and he would get drunk. Essentially, he was brewing beer in his own gut.