In older people, memory is best early in the morning and then declines during the late afternoon.
33
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
Fingernails grow nearly 4 times faster than toenails.
31
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
The aorta, the largest artery in the body, is almost the diameter of a garden hose.
37
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
If your stomach didn't produce a new layer of mucous every two weeks, it would digest itself.
33