We’re not sure from where Earth’s water came [1]. Some evidence suggests the Earth was born with all its water, some that most came from comets.
[1] https://en.m.wikipedia.org/wiki/Origin_of_water_on_Earth
We’re not sure from where Earth’s water came [1]. Some evidence suggests the Earth was born with all its water, some that most came from comets.
[1] https://en.m.wikipedia.org/wiki/Origin_of_water_on_Earth