A new study finds Water that Earth may have been here since planets formed. and did not return after the collision with the icy comet. The results of the research analyzed lunar rocks brought to Earth by the Apollo program. and may help shed light on the early days of the Earth . Although more than 70% of the Earth's surface is covered with water, But overall, our planet's water and volatile molecules are relatively poor compared to other objects.
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mostly in the solar system Lead author of the study Lars Borg, a planetary scientist at Lawrence Livermore National Laboratory in Livermore. California, told Space.com. Scientists have long debated how the Earth came to dominate water. There were two major scenarios, Bork said, and both involved an ancient cosmic impact, the most notorious of which saw
the proto-Earth collide with a Mars-sized rock dubbed Thea that helped birth the moon, Bork said. In the first scenario, "Earth was born dry and inherited its waters through the addition of watery bodies such as comets and primitive meteorites," Borg said. Earth was formed with an abundance of volatile elements similar to the normal solar system. But most of it was lost during the giant collision that formed the moon.