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

Henry Cejudo’s dream of fighting on the anniversary of his Olympic gold-medal win has been derailed by injury, the ex-UFC champion has said. Cejudo was due to face Marlon “Chito Vera” at a UFC Fight Night on 19 August – the 15th anniversary of his wrestling triumph for the United States at the Beijing Games. However, a shoulder injury will prevent Cejudo, 36, from competing this summer, denying him the chance to bounce back from a recent loss. Cejudo, one of just four dual-weight champions in UFC history, retired from mixed martial arts in 2020 but returned in May, losing to bantamweight champion Aljamain Sterling on points. “Unfortunately due to my right shoulder, I won’t be able to fight,” Cejudo said on Instagram on Thursday (29 June). “I’ve already torn my left shoulder, where I was out for about a year. I don’t want it to tear further than what it already is. “The cat’s out the bag. It’s actually a 50 per cent tear. I stretched it out to as much as I possibly could, because I love that Chito Vera match-up, but between my shoulder and my baby expected on 25 October, it’s the best decision for me and my family to not fight in August. “Nothing changes with my future goals. I want my title back. When I’m back to 100 per cent, you’ll see me in the Octagon again. But until then, I need to heal. I hope the UFC can find a replacement to fight Chito, so he could stay on the card. I would’ve loved to fight him in Boston on the 15-year anniversary of my gold medal. But I’ll be back.” Cejudo won the UFC flyweight title in 2018 and claimed the bantamweight belt in 2019. He retained each title once and vacated both prior to retiring in 2020. In May, he returned to MMA and attempted to reclaim the bantamweight title by challenging Sterling, who beat Cejudo via split decision. Click here to subscribe to The Independent’s Sport YouTube channel for all the latest sports videos. Read More Conor McGregor doubles down on Ultimate Fighter criticism as Michael Chandler’s team dominate Tyson Fury’s ‘game-changing’ return to be announced in ‘next week or so’, Frank Warren says Elon Musk vs Mark Zuckerberg: Who would win a fight between tech titans? Strickland vs Magomedov live stream: How to watch UFC Fight Night online and on TV this weekend

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The controversial influencer and internet personality Andrew Tate is to livestream himself for 24 hours in a fake jail cell, following his release from a real-life cell awaiting trial on charges of human trafficking. The former kickboxer posted a promotional video for the stunt on Twitter, saying: “I’m going back to jail. On August 12, Saturday at 10pm Romanian Time. I will spend 24 hours inside a re-creation of my experience in jail. No phones, No freedom.” Tate and his brother Tristan, both of whom have dual US and British citizenship, were charged in June along with two Romanian female suspects of human trafficking, rape and forming a criminal gang to sexually exploit women. The suspects have denied the allegations. Sign up to our free Indy100 weekly newsletter On 4 August a Romanian court placed Tate under judicial control, a less restrictive measure than the house arrest he had previously been subject to. He was held in a cell for 92 days earlier this year. The latest publicity stunt appears to be designed to garner sympathy among his loud, mostly male and often misogynistic fanbase. Tate has repeatedly bemoaned his detention, and the latest video includes stock footage of cockroaches, which he says he shared his cell with. Romania’s anti-organised crime agency alleges the Tate brothers and two other defendants formed a criminal group in 2021 “in order to commit the crime of human trafficking” in Romania as well as the US and Britain. The agency alleges that seven female victims were deceived and transported to Romania, including some who were “misled” by “false claims of marriage and love”. The alleged victims were taken to buildings in Ilfov county where prosecutors said they were sexually exploited and subjected to physical violence by the gang. One defendant is accused of raping a woman twice in March 2022, according to the statement. Tate, who has lived in Romania since 2017, and his brother have denied all of the allegations, with a trial due to take place. 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.

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