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An unknown source has been sending radio blasts towards Earth since at least 1988, scientists say. The researchers do not know what object is sending the radio waves towards Earth. The nature of the waves is such that they do not conform with any models that attempt to explain it. For 35 years, the source has been sending out regular 20-minute blasts of energy that vary considerably in their brightness, researchers say. The emissions appear something like the blasts that come out of pulsars or fast radio bursts, which last for milliseconds to several seconds. But the newly discovered source sends radio signals that pulsate on a period of 21 minutes – something previously thought impossible by expected explanations. Pulsars are neutron stars that spin around quickly, throwing out radio blasts as they do. When one crosses Earth, the emissions can be picked up very briefly and brightly, like being in the path of the light from a rotating lighthouse. Scientists believe that process can only work if the magnetic field of the pulsar is strong, and it is rotating quickly enough – if not, there would not be enough energy to see the pulsar from Earth. That has led to the development of the “pulsar death line”, which suggests that sources must be spinning fast and strong enough to be detected. The newly discovered object named GPMJ1839-10, however, is way beyond that death line. If it is a pulsar, then it seems to be operating in ways that scientists thought impossible. It could also be a highly magnetised white dwarf or magnetar, an extra kind of neutron star with incredibly strong magnetic fields. But they do not tend to send out emissions of this kind, researchers believe. The signals have been detected on Earth since at least 1988, scientists found by going through old records, but they had gone unnoticed by those collecting that data. After the source was detected, researchers checked radio archives and found that the source has been repeating for at least 35 years. Yet more discoveries may be made in this way in the future, said Victoria M Kaspi, a professor of physics at McGill University who did not work on the study. “Only time will tell what else lurks in these data, and what observations across many astronomical timescales will reveal,” she wrote in an accompanying article. That might include some explanation of how unusual the newly discovered source is. By examining whether there are is a similar collection of other objects in the data, researchers might be able to understand the mechanisms behind the newly discovered emissions. The findings are reported in a new paper, ‘A long-period radio transient active for three decades’, published in the journal Nature. Read More Scientists invent self-healing solar panels with ‘miracle material’ Powerful solar flare to disrupt communications, Russians warn New technique represents major breakthrough in search for aliens, scientists say

Social media can be a nasty place at times, but every now and then a trend comes along which reminds you just how fun it can be. The most recent is the blue couch, which has been the talk of Twitter for the past week or so. In case you missed it, influencer Amanda Joy got a lot of people talking recently after finding a couch abandoned on the streets of New York. After doing a little research and believing it to be the $8,000 ‘Bubble’ couch from French brand Roche Bobois, she decided to take it back to her apartment and clean it up. Sign up to our free Indy100 weekly newsletter Joy’s dad picked up the couch in his van and Joy filmed the entire process of brightening up the sofa and moving it to her living room. The TikTok now has over 40 million views, and over 4 million likes – but not everyone thought it was a good idea to take the couch off the sidewalk. Some believed the unique-looking piece wasn’t the real deal and instead claimed it was a knockoff. Others were concerned about possible bed bugs and roach infestations, with no sign of how long the couch had been on the street. In the days that followed it continued to raise eyebrows across the internet, and these are some of the biggest reactions and memes. Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.