The bark of an older redwood tree is fireproof.
65
Scientists aren't sure what color dinosaurs were.
312
Pure water (H2O) does not conduct electricity on its own.
46
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
Indoor pollution is 10 times more toxic than outdoor pollution.
62
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89