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A natural remedy that has previously helped counter oil spills will be too slow to "do any useful work" if there's a spill in ...

If I have sounded like a broken record these past months, it is because these developments in American public health are as ...

Just a week had remained before scientists in South Africa were to begin clinical trials of an HIV vaccine, and hopes were ...

A 54-pound (25-kilogram) rock. Estimated auction price: $2 million to $4 million. Why so expensive? It's the largest piece of Mars ever found on ...