We know Earth is old. Scientists estimate that our planet formed around 4.5 billion years ago. But how old is it exactly? And what was it like when our planet was still forming? These questions have ...
The people at the Smithsonian Institution National Museum of Natural History were nice enough to give a couple members of the Chemistry in Pictures team a behind-the-scenes look at their mineral ...
Oldest Rocks on the Earth: The Acasta Gneiss is known as one of the oldest rocks on the Earth because it is estimated to be about 4.0 to 4.03 billion years old. The Acasta Gneiss is regarded as the ...
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