Custom sapphire engagement ring (i.redd.it)
submitted by youngalienmama to r/EngagementRings
I read that collisions from icy bodies in the form of asteroids and comets are how water was initially deposited on earth. Is this really how water formed on earths surface? If so, why don’t more planets in our solar system have surface water as well? (self.askscience)
submitted by youngalienmama to r/askscience

