Earth formed around 4.54 billion years ago. Knowing how old Earth is can be more difficult to confirm because Earth's age is not only based on the age of rocks, but also the isotopic estimates of what ...
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Earth was formed with lots of cosmic rays from a supernova, and many of them could be out there
Earth is a rare cosmic body which supports life with just the right balance of ingredients and is in the optimal zone near the Sun where it is warm enough for life to thrive. Our planet has an ...
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