Earth Had No Continents

 Scientists now have evidence that suggests that Earth was all water when it was created, and there were no continents. Earth's first water may have arrived by ice-rich comets. When Earth was a hot magma ocean, water vapor escaped into the atmosphere. The rocky landscape in Australia preserved a hydrothermal system that contains different isotopes of oxygen. Scientists found that oceans hold more oxygen-18 than oxygen-16. Their computer models showed that on a global scale, land masses attached onto oxygen-18 pulling it from the water. With no continents, oceans would hold a lot of oxygen-18. The ratio between these two oxygen isotopes hints that, back then, there could have been no continents.

I find this quite interesting because I never thought that there could have been no continents on Earth from the beginning. This could also possibly change our knowledge on the way humans and life in general have evolved over the years. 

Comments

  1. AnonymousFebruary 11, 2021 at 3:23 PM

    Do you think that the earth will ever change this drastically again?

    ReplyDelete
  2. AnonymousFebruary 17, 2021 at 11:51 AM

    It is hard to believe that Earth was once completely water and that there was never any land in the beginning. Some scientists think that the continents are slowly getting smaller and maybe millions of years from now, Earth will return to its original state of completely water.

    ReplyDelete
  3. AnonymousFebruary 17, 2021 at 2:16 PM

    Earth at one point not having continents is honestly a little disturbing. Also, the fact that Earth could return to that stage is terrifying. However, it is kind of interesting at the same time to think that at one point, we were just a hot ocean of magma.

    ReplyDelete
  4. AnonymousFebruary 18, 2021 at 6:34 AM

    https://www.livescience.com/waterworld-earth.html

    ReplyDelete

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