It feels like every time black holes are discussed and studied by the scientific community, there are new findings that blow our tiny minds. It’s been revealed that black holes actually regurgitate or “burp up” the stars that they eat years after the event. Experts made the discovery by studying tidal disruption events (TDEs). These events take place when stars are close enough to supermassive black holes, to be destroyed by the process of spaghettification. Studying these moments over a number of years after the black holes seemingly swallowing stars with no trace, the experts found that up to 50 per cent of them "burp up" the remains. Yvette Cendes is a research associate at the Havard and Smithsonian Center for Astrophysics and head author on the study. Speaking to Live Science, she said: "If you look years later, a very, very large fraction of these black holes that don’t have radio emission at these early times will actually suddenly 'turn on' in radio waves. "I call it a 'burp' because we’re having some sort of delay where this material is not coming out of the accretion disk until much later than people were anticipating." The material was re-emitted between two and six years from 10 out of 24 black holes which were studied by Cendes and the team. It has the potential to change the way the scientific community thinks about black holes. "There was a second peak, the two black holes re-brightened, and that's completely new and unexpected," Cendes said. "People were thinking that you'd have one outflow, and then it's kind of done. So this observation means these black holes can 'turn on' and then 'turn on' again." Meanwhile, a low intergalactic grumbling is emanating from deep space, according to scientists – and again, it’s black holes that are providing us with new discoveries. Astronomers say they detected the first-of-their-kind low frequency ripples, described as a “cosmic bass note” of gravitational waves, which is thought to be caused by supermassive black holes merging across the universe. Sign up for our free Indy100 weekly newsletter 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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The man who is 'ageing backwards' Bryan Johnson has revealed he now uses a machine to generate tears after his body stopped producing them. Johnson, who has the 'biological age of an 18-year-old' has gone viral for going to extremes to achieve peak health, however, it would seem everything isn't going so smoothly with his eyesight. "I have a dry eye condition which we found in our routine [doctor] visit", he tells the camera. He then films himself using the FDA-approved iTear100, which massages the side of his nose to stimulate tear ducts. Sign up to our new free Indy100 weekly newsletter

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SpaceX will not be cleared to launch its 400-foot-tall (121 metre) Starship rocket until a “mishap investigation” is completed, regulators have said. A statement from the Federal Aviation Administration (FAA) warned of a launch delay for the biggest rocket ever built, just hours after SpaceX boss Elon Musk said the craft was “ready to launch” on Wednesday. SpaceX made its first and only attempt at an orbital Starship launch in April, with the rocket exploding over the Gulf of Mexico just three minutes into the 90 minute flight. The crewless rocket broke up into pieces over an empty stretch of water, however the debris blast created by Starship’s huge engines at its launchpad drew heavy scrutiny from regulators. Concrete dust drifted more than 10 kilometres from the launch site, according to the Fish and Wildlife Service, while concrete chunks and metal shards were discovered within a 700-acre zone surrounding the pad. SpaceX claimed the mission was a success, as Starship and its Super Heavy booster were able to lift off on its maiden test flight, however the FAA launched an investigation soon afterwards. Following Mr Musk’s latest comments that the latest version of the rocket is ready to launch pending regulatory approval, the FAA warned SpaceX that it would need to wait for the investigation to conclude. “The SpaceX Starship mishap investigation remains open,” the FAA said in a statement. “The FAA will not authorise another Starship launch until SpaceX implements the corrective actions identified during the mishap investigation and demonstrates compliance with all the regulatory requirements of the licence modification process.” SpaceX has made numerous alterations and improvements to Starship and its launch pad, including remedial measures aimed at preventing launch debris and a new method for separating the upper stage from its booster rocket. Nasa has already awarded SpaceX a multi-billion dollar contract to develop Starship for its Artemis program, which aims to return humans to the surface of the Moon for the first time in more than 50 years. Mr Musk also plans to use the rockets for more ambitious longer term goals, including establishing a permanent human colony on Mars before 2050. “As the most powerful launch system ever developed, Starship will be able to carry up to 100 people on long-duration, interplanetary flights,” SpaceX notes on its website. “Starship will also help enable transport of many satellites, large space telescopes, and significant amounts of cargo to Earth orbit, the Moon, Mars and beyond.” Read More ‘It’s becoming like an airport’: How SpaceX normalised rocket launches SpaceX abandons YouTube for live streams of launches in favour of X/Twitter Starship ‘ready to launch’, Elon Musk says SpaceX crew streak across sky before splashing down off Florida coast SpaceX smashes rocket launch record as Musk eyes historic Starship mission

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