Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Out of all the senses, smell is most closely linked to memory.
146
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
Cold water weighs more than hot water.
93
In zero gravity, a candle's flame is round and blue.
16
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
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
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18