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Plate tectonics and the search for life

Simulations suggest early exoplanets may be the best bet.

exoplanet
Galaxy M51 in the process of merging with a smaller galaxy, about 30 million light-years away. Credit: X-ray: NASA/CXC/SAO; Optical: Detlef Hartmann; Infrared: Courtesy NASA/JPL-Caltech.