Modern modeling has shown that the planet was formed from small pebbles over several million years, not hundreds as previously thought.
One of the key findings of the study was that water and other vital components were delivered to Earth very early, not by random asteroids but by sucking up dust from the disk surrounding the young solar system.
This new understanding of planet formation gives scientists more insight to search for habitable worlds in other star systems. Experts believe that if every planet like Earth formed in the same order, it would have water.
Source: Ferra

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