8 Scientific Questions That
Drive Us CRAZY ... And
Might Never Be Answered

What Causes Gravity?

soccer-player-flipping-upside-down Credit

Of the four fundamental forces in the universe, gravity is the one force that has baffled scientists. Some believe that graviton particles may be responsible but because it's the weakest of all the other forces, it's difficult to actually study. But if we ever figure it out we could probably replicate it in conditions like on space stations and shuttles.

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