Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The bark of an older redwood tree is fireproof.
65
The only letter not appearing on the Periodic Table is the letter "J".
180
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
Aluminum used to be more valuable than gold!
84
Diamonds can be shattered with a hammer.
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Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21