It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
The human brain uses approximately as much energy as a 10 watt light bulb.
120
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
Enamel is hardest substance in the human body.
61
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The human body contains over a billion miles of DNA.
147
Your heart will pump about 212 million liters in its lifetime.
26
Your thumb is about the same size as your nose.
124