Your fingernails grow faster in summer.
744
Nokia was once famous as a manufacturer of toilet paper.
17
Sitting straight upright in your chair is bad for your back. You should instead slouch at an angle of 135 degrees.
10
Your wounds heal faster if you lick them, you instinctively do this for that reason. Tears help, too.
20
Pumice is the only rock that floats on water.
14
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4