Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Iron weighs more after it rusts.
68
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The smell of freshly cut grass is actually a plant distress call.
31