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The Geminids meteor shower began in a “violent catastrophe”, scientists have found. Every winter, the world is delighted by the meteor shower, which brings some of the most intense display of ‘shooting stars’. But that spectacle has been rivalled by its mystery. The Geminids are unusual in that most meteor showers are created when a comet leaves behind a tail of ice and dust – but the Geminids come from an asteroid, which do not usually leave behind a tail. Asteroids are chunks of rock and metal flying around in space. The Geminids appear to originate with one called 3200 Phaethon, which for an unexplained reason is affected by the Sun and leaves behind a stream across the night sky. “What’s really weird is that we know that 3200 Phaethon is an asteroid, but as it flies by the Sun, it seems to have some kind of temperature-driven activity,” said Jamey Szalay, research scholar at the Princeton University space physics laboratory and co-author on the paper. “Most asteroids don’t do that.” Attempts to solve that mystery have struggled in part because the meteor shower has only been observed from Earth. Now, however, researchers using Nasa’s Parker Solar Probe have been better able to examine the the Geminids. They suggest that a violent, catastrophic event gave rise to the meteor shower. That could have been a high-speed collision with another object in space, for instance, or a gaseous explosion. Some researchers have previously suggested that 3200 Phaethon might really be a comet, and that it lost its snow to leave behind just a rocky core that looks like an asteroid. But the new study makes clear that the origins of the meteor shower are much more dramatic than that. In an attempt to understand the meteor shower, researchers simulated three possible formation scenarios and then compared them with models based on observations from the Parker Solar Probe. That included a less violent scenario, a more violent one, and another that was in line with a comet. When they compared those scenarios with the actual observations, they found that the violent one was the most similar. That suggests that it was the result a collision or similar dramatic event. Researchers still do not know for sure what happened. But the new study helps narrow down the possibilities – as well as shedding more light on such events in space. The findings are published in a new article, ‘Formation, Structure, and Detectability of the Geminids Meteoroid Stream’, published in Planetary Science. Read More Watch live as astronauts step out of ISS for latest spacewalk Major finding boosts hope for finding alien life in our solar system Astronomers find rare planet circling two stars like Star Wars’s Tatooine

Warning: This article does contain images some readers might find disturbing. Investigators have been left puzzled after finding a man’s body in a stage of “complete mummification” just 16 days after he was last seen alive. The man was found alongside a railway line in Bulgaria on 3 September. Identity checks later found he was 34 when he died, with a history of alcoholism, and was last seen alive on 16 August. However, his insides had been reduced to “structureless masses”, and case workers have been unable to explain how the body reached such an advanced state of mummification so quickly. A report published in Cureus journal shows a full set of pictures of the corpse – linked at the foot of this article. Trigger warning, they’re pretty gruesome. It has got scientists fascinated though. The report’s authors reveal that the “skin surface showed coloration ranging from light to dark brown, and it was hard and leathery.” “The internal examination of the body showed that the internal organs in the cranial, thoracic, and abdominal cavities had decayed into dried, brownish-black masses,” they write. Researchers stressed that natural mummification “usually takes several weeks to 6-12 months”, and that such a fast transformation would only normally happen in extreme heat. The temperature in Sofia has ranged from 16 to 33 degrees Celsius in the time period, which scientists said is not hot enough. The authors speculated that passing trains could have created a windy environment that could have contributed to drying out the body and causing bodily fluids to evaporate. They said it almost certainly wasn’t the weather in Sofia that caused the bizarrely fast mummification process. As of yet, it remains a mystery. Here’s the journal article. Sign up to 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.