Flu shots only work about 70% of the time.
18
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
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
Each nostril of a human being register smell in a different way. Smells that are made from the right nostril are more pleasant than the left.
38
On average, there's 100 billion neurons in the human brain.
83
In Japan, condoms are commonly sold 'door to door'!
54
Men get hiccups more often than women.
93