The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Held in farts enter your bloodstream and are bad for your body.
26
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 doesn't stop developing until about 25 years old.
102
The human brain uses approximately as much energy as a 10 watt light bulb.
120
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
There's 100 trillion good bacteria living in your body.
17
Your thumb is about the same size as your nose.
124