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‘Wild theory’: Can aggressive cancers evolve into new species?

Aggressive cancers can spread so fiercely that they seem less like tissues gone wrong and more like invasive parasites looking ...
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Why scientists are hesitant to declare a species extinct

If so many species are going extinct, why don’t we hear about new extinctions every day?  The answer to that ...
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Were the Denisovans a collection of 3 different species?

A new study using genetic data is offering an intriguing new look into the history of the Denisovans, revealing them as a ...
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How can seemingly-unique animals be genetically the same?

More and more, biologists are discovering that organisms thought to be different species are, in fact, but one. A recent ...
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