LPItoday on Twitter: "Scientists discover what may be Earth's oldest rock in a lunar sample returned by the Apollo 14 astronauts. The research about this possible relic from the Hadean Earth is
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PDF) Comment on “Stability of the Earth with respect to the spin axis for the last 130 million years” by J.A. Tarduno and A.Y. Smirnov | Pierre Camps - Academia.edu