Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
One 75-watt bulb gives more light than three 25-watt bulbs.
57
In zero gravity, a candle's flame is round and blue.
16
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Balsa wood is classified as a hard wood!
41
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
The bark of an older redwood tree is fireproof.
65