Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
A man's beard grows fastest when he anticipates sex.
239
Your wounds heal faster if you lick them, you instinctively do this for that reason. Tears help, too.
20
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
The pupil of the eye expands as much as 45 percent when a person looks at something pleasing.
130
Tap water in Canada is held to a higher health standard than bottled water.
19