The Sama-Bajau, a sea-faring and nomadic people, have physical adaptations that enable them to see better and dive longer underwater. It was recently discovered that they have evolved bigger spleens that provides a larger reservoir of oxygenated red blood cells.
If you were to instantly vanish, there would be a shell of microscopic creatures left behind.
Some people can “flex” muscles in their inner ears to produce a low rumbling sound.
You can change your testosterone and cortisol levels by changing body language and acting more alpha.
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.