BY GUGHANESWARAN DANERPALAN
ASTRONAUTS call Earth as a blue marble since it looks like a perfect round ball. However, Earth is not perfectly round and closer to ellipsoid but why did earth turn to be round and not cube or pyramid? It is because of gravity! 4.6 billion years ago scientists theorised that the solar system was a cloud of dust and gas. Earth’s rocky core was the first part of the planet to form before lighter pieces gathered and formed Earth’s crust. As more materials began to bump and clump together when a gravitational force acts to hold all the stuff together.
