By Drazen Jorgic MEXICO CITY (Reuters) -Tropical storm Hilary made landfall over the Baja California peninsula on Sunday, pelting the

Scientists think they have discovered a previously unknown hidden structure inside the Earth’s core that could change our understanding of our planet. In school, most of us were taught there are four main layers to the Earth’s structure: the crust, the mantle, the outer core and the inner core. What we know about the Earth’s insides has mostly derived from geologists’ knowledge and observations of volcanoes and seismic waves. But now, scientists believe that there may also be a whole extra layer hidden inside the inner core that no one knew about. Earth’s molten inner core is predicted to be around 5,000 degrees Celsius in temperature and scientists have calculated that it takes up around just 1 per cent of the planet’s total volume. The discovery of a potential fifth layer to the planet’s core came a few years ago when scientists used an algorithm to model thousands of scenarios of the inner core to observe the length of time it takes seismic waves to travel through Earth based on data by the International Seismological Centre. Sign up to our new free Indy100 weekly newsletter Scientists were able to analyse how different material properties within the inner core would affect seismic waves differently and found that some scenarios were certainly more likely than others. The algorithm showed how different materials altered the angle of seismic waves, leading them to hypothesise that there was a change of material somewhere in the inner core. Joanne Stephenson, an Australian National University geophysicist, explained: “We found evidence that may indicate a change in the structure of iron, which suggests perhaps two separate cooling events in Earth's history.” She continued: “The details of this big event are still a bit of a mystery, but we've added another piece of the puzzle when it comes to our knowledge of the Earth's inner core.” While their data isn’t conclusive, it does correlate with other similar studies that have looked into the anisotropy of the Earth’s inner core. Stephenson said: “It's very exciting - and might mean we have to re-write the textbooks!” 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.

French police are investigating a violent armed robbery that targeted Paris Saint-Germain goalkeeper Gianluigi Donnarumma at his home. The Paris prosecutor's office said the player was targeted overnight Thursday to Friday. The prosecutor's office and the French capital's police force refused to release details about the attack that French media said took place in the early hours of the morning in his Paris home. A police investigation has been opened on possible armed robbery, kidnapping and aggravated violence charges, the prosecutor's office said. Le Parisien newspaper, quoting an unnamed police source, reported that four people broke into his apartment in Paris' upmarket 8th district at about 3 a.m. It said Donnarumma and his partner were tied up and that he was slightly injured. Both were treated in hospital for shock, it said. The attackers made off with valuables estimated to be worth about half a million euros (dollars), including watches, jewelry and other luxury accessories, the newspaper said. French champion PSG leaves Saturday for a pre-season tour of Japan. The 24-year-old Donnarumma joined PSG from AC Milan after helping Italy win the European Championship in 2021, where he was named the tournament's best player. He has won the French league title in his two seasons with PSG and was voted the league's best goalkeeper last season. Several PSG players have been robbed in previous years. Among them were Brazil defender Marquinhos and Argentina's World Cup-winning winger Angel Di Maria, who both had their homes robbed in 2021. Read More Women’s World Cup LIVE: Today’s results and latest news Ellie Roebuck: England and Man City goalkeeper in profile England goalkeeper Mary Earps hits out at Nike for refusing to sell her shirt

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Conor McGregor took another step towards returning to UFC by re-entering the United States Anti-Doping Agency’s (Usada) testing programme. The 35-year-old has not fought since July 2021 when he was beaten by Dustin Poirier for a second time and suffered a broken leg. He has been out of the Usada testing pool since, but the agency announced he has re-entered. It said in a statement: “We can confirm that Conor McGregor has re-entered the USADA testing pool as of Sunday, October 8, 2023. “We have been clear and firm with the UFC that there should be no exception given by the UFC for McGregor to fight until he has returned two negative tests and been in the pool for at least six months. “The rules also allow Usada to keep someone in the testing pool longer before competing based on their declarations upon entry in the pool and testing results.” “The Notorious” has been rumoured to fight Michael Chandler before the end of the year but that will not happen until April 2024 at the earliest due to Usada’s rules. Read More AI scouting app gives players chance to be noticed in the professional game Josh Magennis determined to keep giving his all for Northern Ireland Andy Farrell feels Ireland are becoming better at handling pressure

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