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Submission + - Entirely New Class of Life Has Been Found in The Human Digestive System (sciencealert.com)

Submitted by Anonymous Coward
An anonymous reader writes: 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. "The more we look, the more crazy things we see." These mysterious bits of genetic material have no detectable sequences or even structural similarities known to any other biological agents.

So Stanford University biologist Ivan Zheludev and colleagues argue their strange discovery may not be viruses at all, but instead an entirely new group of entities that may help bridge the ancient gap between the simplest genetic molecules and more complex viruses. "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. In fact, this brevity is likely one of the reasons we've failed to notice them previously.

In a study that has yet to be peer reviewed, Zheludev and team searched 5.4 million datasets of published genetic sequences and identified almost 30,000 different Obelisks. They appeared in about 10 percent of the human microbiomes the team examined. In one set of data, Obelisks turned up in 50 percent of the patients' oral samples. What's more, different types of Obelisks appear to be present in different areas of our bodies. "[This] supports the notion that Obelisks might include colonists of said human microbiomes," the researchers explain. They managed to isolate one type of host cell from our microbiome, the bacterium Streptococcus sanguinis – a common human mouth microbe. The Obelisk in these microbes had a loop 1,137 nucleotides long. "While we don't know the 'hosts' of other Obelisks," write Zheludev and colleagues. "it is reasonable to assume that at least a fraction may be present in bacteria." The question of the Obelisks' source aside, all seem to include codes for a new class of protein the researchers have named Oblins.

Comment Well of course they shouldn't (Score 3, Insightful) 346

by C3ntaur (#60522562) Attached to: Should Employers Cut Your Salary If You Change Cities?

But that's not the point. An employer will only pay you what they think you will take, and not a penny more. If you're in a location with a lower cost of living, of course they will pay you less.

This is why organized labor is so important. No individual worker can ever hope to get a fair shake on their own.

Comment The computer did it (Score 1) 107

by C3ntaur (#59221608) Attached to: Ex-Google Engineer Says That Robot Weapons May Cause Accidental Mass Killings

Remember when office and storefront automation first got big? How employees who interacted with customers would fall back on "the computer did (or didn't) do something" and I have no way to help you?

Guess what the creators and owners of all this automated gear are going to say when it runs amok? I'm not so concerned about AI itself as I am about how it will let people involved with it avoid responsibility. And when it's weaponry, it becomes a license to kill.

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