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feb 14, 1889 - Robert Mantovani

Description:

In 1889 and 1909, Robert Mantovani claimed that Earth used to be much smaller, but because of volcanic action, our planet grew. That process is called mantle convection currents.

Added to timeline:

8 months ago
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Date:

feb 14, 1889
Now
~ 129 years ago

Images:

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