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1 day ago · In physics, theories of gravitation postulate mechanisms of interaction governing the movements of bodies with mass. There have been numerous theories of gravitation since ancient times. The first extant sources discussing such theories are found in ancient Greek philosophy. This work was furthered through the Middle Ages by Indian, Islamic ...
7 hours ago · Scientists have the most convincing evidence yet of an underground cave on the moon. The large cave could be a safe, warm place for astronauts to work and live on the moon. The researchers want to use radar technology to identify even more caves under the lunar surface. In the ongoing effort to ...
