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'Obelisks': New class of life has been found in human digestive system

Peering into the jungle of microbes that live within us, researchers have stumbled across what seem to be an entire new class of virus-like objects.

"It's insane," says University of North Carolina cell biologist Mark Peifer, who was not involved in the study, told Elizabeth Pennisi at Science Magazine. "Obelisks comprise a class of diverse RNAs that have colonized, and gone unnoticed in, human, and global microbiomes," the researchers write in a preprint paper. Named after the highly-symmetrical, rod-like structures formed by its twisted lengths of RNA, the Obelisks' genetic sequences are only around 1,000 characters (nucleotides) in size.

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