4.5 pounds of sunlight strike the Earth each day.
27
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
In zero gravity, a candle's flame is round and blue.
16
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Diamonds can be shattered with a hammer.
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