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| Keyword：years ago Early Earth may have been a |
| Concept： |
| Chemical changes in the oceans more than 800 million years ago almost destroyed the oxygen-rich atmosphere that paved the way for complex life on Earth, ... |
| What did Earth look like 3.2 billion years ago? New evidence suggests the planet was covered by a vast ocean and had no continents at all. Continents ... |
| When it was very young, the planet Earth looked rather different from the one we know and love today. For one, it had supercontinents - when the landmasses ... |
| Kevin Costner, eat your heart out. New research shows that the early Earth, home to some of our planet"s first lifeforms, may have been a real-life 「waterworld」 ... |
| New research shows that the early Earth, home to some of our planet"s first lifeforms, may have been a real-life "waterworld"0.0 without a continent in sight. |
| Perhaps Kevin Costner"s famously bloated 1995 film "Waterworld" deserves more credit. |
| Chemical signatures in ancient ocean crust point to a planet without continents. |
| Scientists have found evidence that Earth was covered by a global ocean that turned the planet into a 「water world」 more than 3bn years ago. |
| Evolution of life on Earth was nearly nipped in the bud one billion years ago as key chemical reactions in the world"s oceans starved the planet of oxygen. |
| Kevin Costner, eat your heart out. New research shows that the early Earth, home to some of our planet"s first lifeforms, may have been a real-life "waterworld"— ... |