Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Nearly 50% of the world's scientists are assigned to military projects.
71
Aluminum used to be more valuable than gold!
84
A cesium atom in an atomic clock beats over nine billion times a second.
43
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The storage capacity of human brain exceeds 4 Terrabytes.
140
The sun is 330,330 times larger than the earth.
75