Google Earth has introduced a web-based flight simulator, allowing users to explore the world from the cockpit for free. Here's how to access and use the feature.
Iron-rich spherules like the ones shown here can contain chemical clues about the composition of the early Earth’s atmosphere. (UW Photo / Don Brownlee) Today, rising carbon dioxide in the atmosphere ...
A violent battering of the early Earth by comets and asteroids that went on for 500 millions years was crucial to the evolution of our planet and may have prepared it for life, researchers say. The ...
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