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Gravity
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Microscopic Organisms
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The Speed Of Light
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The Battery
Alessandro Volta invented the electric battery -
Evolution
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X-Rays
Wilhelm Conrad Röntgen invented the X-ray -
Penicillin
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Atomic Bomb
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The Chromosone
Oswald Avery proves that DNA is the genetic material of the chromosome -
The First Cloned Sheep
Roslin Institute cloned Dolly the sheep using the process of nuclear transfer.