These meteorites contain all the building blocks of DNA

These meteorites contain all the building blocks of DNA

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Three meteorites contain the molecular building blocks of DNA and its cousin RNA, scientists have recently discovered. A subset of these building blocks had previously been detected in meteorites, but the rest of the collection seemed mysteriously absent from space rocks – until now. The new discovery supports the idea that around four billion years…

DNA Mutation Time Bombs May Dictate When Animals Die

DNA Mutation Time Bombs May Dictate When Animals Die

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Animals carry “mutational clocks” in their cells that dictate how quickly their DNA picks up mutations. And across species, animals tend to die once they reach a certain number of mutations, according to new research. It turns out that in long-lived mammals like humans, these mutational clocks run slower than in short-lived mammals like mice,…