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
The human brain is insensitive to pain.
76
There is a disease called ichthyosis that turns the skin scaly like a fish.
90
Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
103
Motorists who talk on cell phones are more impaired than drunk drivers with blood-alcohol levels exceeding .08!
49
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127