Space
Spectacular galactic collision spawns cosmic tadpole
Two colliding galaxies ripping each other slowly apart have spread a trail of new stars across the cosmos and may reveal our own celestial history
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All the latest on newscientist.com: urban smellscapes, Vermont's climate plan, why cool science isn't enough, how Europe got farmers and more
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Environment
Food or family? Florida reptiles battle over eggs
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Technology
3D-printed handles for flint-knapped hand axes
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Today on 51动漫
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