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@bozzalad | 25 February 20 | |
When the parasitic blob known as Henneguya salminicola sinks its spores into the flesh of a tasty fish, it does not hold its breath. That's because H. salminicola is the only known animal on Earth that does not breathe. If you spent your entire life infecting the dense muscle tissues of fish and underwater worms, like H. salminicola does, you probably wouldn't have much opportunity to turn oxygen into energy, either. However, all other multicellular animals on Earth whose DNA scientists have had a chance to sequence have some respiratory genes. According to a new study published today (Feb. 24) in the journal Proceedings of the National Academy of Sciences, H. salminicola's genome does not. A microscopic and genomic analysis of the creature revealed that, unlike all other known animals, H. salminicola has no mitochondrial genome the small but crucial portion of DNA stored in an animal's mitochondria that includes genes responsible for respiration. Related: These bizarre sea monsters once ruled the ocean While that absence is a biological first, it's weirdly in character for the quirky parasite. Like many parasites from the myxozoa class a group of simple, microscopic swimmers distantly related to jellyfish H. salminicola may have once looked a lot more like its jelly ancestors but has gradually evolved to have just about none of its multicellular traits. They have lost their tissue, their nerve cells, their muscles, everything, study co-author Dorothe Huchon, an evolutionary biologist at Tel Aviv University in Israel, told Live Science. And now we find they have lost their ability to breathe. The nucleus of each H. salminicola spore glows green under a fluorescent microscope. Through microscopy and genetic sequencing, the study authors learned that H. salminicola is the only known animal with no mitochondrial DNA. (Image credit: Stephen Douglas Atkinson) That genetic downsizing likely poses an advantage for para |
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@bozzalad | 25 February 20 | |
And more
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@shadow27 | 25 February 20 | |
Interesting
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@crail | 25 February 20 | |
*
I read they think it might get the oxygen from the host
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@ufohunter | 26 February 20 | |
How was life like during the Cretaceous?
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@ufohunter | 26 February 20 | |
Mosasaurus Good thing it became extinct |
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@phallica | 26 February 20 | |
@ ufohunter - 26.02.20 - 09:00am How was life like during the Cretaceous? Sadly, Slwnoris doesn't really frequent this thread. |
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@obi_jon | 28 February 20 | |
Date: February 27, 2020 Source: International Centre for Radio Astronomy Research Summary: Scientists studying a distant galaxy cluster have discovered the biggest explosion seen in the Universe since the Big Bang. The blast came from a supermassive black hole at the centre of a galaxy hundreds of millions of light-years away. It released five times more energy than the previous record holder. http://www.sciencedaily.com/releases/2020/02/200227114459.htm |
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@obi_jon | 28 February 20 | |
@ obi_jon - 28.02.20 - 06:23am Date: February 27, 2020 Source: International Centre for Radio Astronomy Research Summary: Scientists studying a distant galaxy cluster have discovered the biggest explosion seen in the Universe since the Big Bang. The blast came from a supermassive black hole at the centre of a galaxy hundreds of millions of light-years away. It released five times more energy than the previous record holder. http://www.sciencedaily.com/releases/2020/02/200227114459.htm '' The explosion occurred in the Ophiuchus galaxy cluster, about 390 million light-years from Earth. It was so powerful it punched a cavity in the cluster plasma -- the super-hot gas surrounding the black hole. Lead author of the study Dr Simona Giacintucci, from the Naval Research Laboratory in the United States, said the blast was similar to the 1980 eruption of Mount St. Helens, which ripped the top off the mountain. ''The difference is that you could fit 15 Milky Way galaxies in a row into the crater this eruption punched into the cluster's hot gas'', she said. '' |
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@ufohunter | 29 February 20 | |
http://www.spacespeak.com/ Send a personalised message into space, well because SETI should be a collective endeavour. ET is probably waiting for US to be sending all the messages. Waiting for all this time for something, different! |
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