Ancient Marsupial 'Junk DNA' Might Be Useful After All

Ancient Marsupial 'Junk DNA' Might Be Useful After All
( Zoo Wroclaw via AP )

Fossils of ancient viruses are preserved in the genomes of all animals, including humans, and have long been regarded as junk DNA. But are they truly junk, or do they actually serve a useful purpose?

Researchers at UNSW Sydney, who examined the DNA and RNA of 13 Australian marsupial species, believe that viral fossils may be helping protect animals from infection.

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