There seems to be too much of a radioactive element in rocks deep in the Pacific Ocean – how did it get there 10 million ...
The head of planetary defense at the European Space Agency discusses 2024 YR4, an asteroid with a small chance of striking ...
NASA's Perseverance rover has been busy gathering bits of Mars — rock cores the size of chalk sticks, clusters of broken fragments no bigger than pencil erasers, and even grains of dust fine enough to ...
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