- DNA stands for Deoxyribonucleicacid.
- The Amazon rainforest produces half the world's oxygen supply.
- You begin to feel thirsty when your body losses 1% of water.
- Men are stuck by lightning 7 times more than women.
- The expression to 'knuckle down' originated from playing marbles (players used to put their knuckles to the ground for their best shots).
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