Optical illusions occur when what the eyes see conflicts with what the brain expects.
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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
There is a surgical implant being developed that will give you an orgasm at the touch of a button.
20
4.5 pounds of sunlight strike the Earth each day.
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