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Ancient viruses left bits of RNA in coral symbiont DNA

Marine biologists have discovered the remnants of ancient RNA viruses embedded in the DNA of symbiotic organisms living inside reef-building corals.

Ancient viruses discovered in coral symbionts' DNA: Researchers surprised to find fragments of RNA viruses in coral partners' genomes

The symbiotic organisms that live in corals and provide them with their dramatic colors contain fragments of ancient RNA viruses that are as much as 160 million years old.

Ancient viruses discovered in coral symbionts' DNA

Physics - Predicting When a Material Will Crack

A combination of two techniques provides warning signs that the stress on a material will lead to failure.

DR MICHAEL MOSELY: How to stop next week's full moon from wrecking your sleep

DR MICHAEL MOSELY: Many of us struggle to get a good night s sleep, but even if you sleep like a baby, you may notice over the coming week that you are sleeping worse than normal.