The only shape that fits that definition is the sphere. So, gravity is the answer to why Earth is round! If you've seen pictures of asteroids that exist in outer space, you may have noticed that some of them are irregular, rocky shapes. That's because they're not big enough to pull themselves into a sphere.
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The latest archeological discoveries and forensic analyses suggest that the first humans who arrived in the Americas came around 5,000 years earlier than previously thought, and not necessarily by crossing a land brigde between Alaska and Syberia in the Bering Strait. The first arrivals date some 20,000 years ago.
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If I'm not mistaken, it was to protest against the taxes they put
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SNCC sought to coordinate youth-led nonviolent, direct-action campaigns against segregation and other forms of racism. SNCC members played an integral role in sit-ins, Freedom Rides, the 1963 March on Washington, and such voter education projects as the Mississippi Freedom Summer.