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!
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Airports that are at higher altitudes require a longer airstrip due to lower air density.
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Out of all the senses, smell is most closely linked to memory.
146
Aluminum used to be more valuable than gold!
84
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Optical illusions occur when what the eyes see conflicts with what the brain expects.
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