When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
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The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
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Optical illusions occur when what the eyes see conflicts with what the brain expects.
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Iron weighs more after it rusts.
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Because heat expands the metal, the Eiffel Tower always leans away from the sun.
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For a high school science fair project, 17-year-old Michio Kaku built a particle accelerator in his parent's garage that was able to generate a magnetic field 20,000 times greater than the Earth's and produce collisions powerful enough to create antimatter.
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There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
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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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