Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79