Flu shots only work about 70% of the time.
18
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
More people use blue toothbrushes, than red ones!
66
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
Fingernails grow nearly 4 times faster than toenails.
31
In 1996, research found that having excessive body hair is linked to higher intelligence.
23