Why Earth Has So Much Water Compared to Other Planets

Once upon a time, our Earth wasn't the green and blue ball we know today—it was an aqua world! A long time ago, when our planet was still a young cosmic newbie, it was showered with water-rich asteroids. These celestial water deliveries created vast oceans that covered most of the planet's surface. Volcanic activity spewed gases, forming a thick atmosphere and steamy conditions. As our world cooled down, the steamy atmosphere condensed into rain, creating a never-ending cycle of downpours that filled the oceans. So, thanks to a cosmic water ballet and some volcanic help, Earth became the ultimate water park before life even had a chance to do the wave. Learn more about your ad choices. Visit megaphone.fm/adchoices