It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
If you hold farts in during the day, they'll just come out when you sleep.
16
Your thumb is about the same size as your nose.
124
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Your heart will pump about 212 million liters in its lifetime.
26
The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
8
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