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This recently discovered salamander-like apex predator roamed the Earth some 280 million years ago.
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Scientists studying data from the Gaia satellite have identified a massive 'ghost' galaxy lurking nearby.
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Astronomers from ESA's Gaia mission will tomorrow release the largest map of our galaxy ever created.
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The European probe has embarked on an ambitious 5-year mission to map our own galaxy, the Milky Way.