Astronomers were worried last year when a supergiant star visible to the naked eye from Earth started dimming amid concerns it might explode.
Such an explosion could cause serious harm to life on Earth if it was close enough.
But while Betelgeuse has returned to normal, researchers have found evidence that Earth was blasted by another exploding star 2.5 million years ago.
When stars more than ten times bigger than our sun die, they explode in a supernova, a vast explosion.
The explosions lead to the formation of heavy elements found on Earth, including iron and manganese.
Researchers at the Technical University of Munich (TUM) analysed layers of a manganese crust around two and a half million years old.
Dr. Gunther Korschinek said, “The increased concentrations of manganese-53 can be taken as the “smoking gun” – the ultimate proof that this supernova really did take place.”
The researchers say that while the supernova was too far away to damage life on Earth, it caused a boost in cosmic rays over thousands of years.
“Perhaps there is a link to the Pleistocene epoch, the period of the Ice Ages, which began 2.6 million years ago.”
Typically, manganese occurs on Earth as manganese-55. Manganese-53, on the other hand, usually stems from cosmic dust, like that found in the asteroid belt of our solar system.
New sediment layers that accumulate year for year on the sea floor preserve the distribution of the elements in manganese crusts and sediment samples.
Using accelerator mass spectrometry, the team of scientists has now detected both iron-60 and increased levels of manganese-53 in layers that were deposited about two and a half million years ago.
“This is investigative ultra-trace analysis,” says Korschinek. “We are talking about merely a few atoms here. But accelerator mass spectrometry is so sensitive that it even allows us to calculate from our measurements that the star that exploded must have had around 11 to 25 times the size of the sun.”
In late September, the CDC was forced to delete a guidance describing the airborne qualities of the coronavirus. The new guidance comes as President Trump remains hospitalized with what could be a serious case of COVID-19.
Thousands of demonstrators in southern Germany protested against coronavirus restrictions over the weekend, police said on Sunday, although organisers failed to mobilise enough people for a planned human chain around Lake Constance. Thousands of counter-demonstrators in Constance also turned out to show support for the government’s measures to contain the coronavirus while also protesting against right-wing supporters in the other group, police said. Overall, police counted between 10,500 and 11,000 people taking part in the different demonstrations on Saturday and the two-day protests continued on Sunday with sunny weather likely to draw in further participants, a police spokesman said.
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Senator Ron Johnson said Monday that he has no symptoms after testing positive for the coronavirus over the weekend and announced that he plans to vote in person on the Supreme Court nomination even if it means he has to wear a “moon suit.””I feel perfectly normal, I have not had any symptoms,” Johnson said Monday during a radio interview on the Ross Kaminsky Show.Johnson’s office announced Saturday that the Wisconsin Republican tested positive for Covid-19 on Saturday and was not experiencing any symptoms after he was exposed to an individual who also tested positive. The senator is currently quarantining for his third time since the U.S. outbreak began. His diagnosis came a day after President Trump announced that he and First Lady Melania Trump tested positive for the coronavirus.Republican senators Thom Tillis of North Carolina and Mike Lee of Utah, both of whom serve on the Judiciary Committee, also announced last week that they had tested positive for the coronavirus.With the confirmation hearings of President Trump’s Supreme Court nominee Judge Amy Coney Barrett scheduled to begin on October 12, some Senate Democrats including Senate Minority Leader Chuck Schumer and Senator Dianne Feinstein, the ranking Democrat on the Judiciary Committee, have called for the upcoming hearings to be postponed to allow Barrett and senators who were potentially exposed to the virus to be tested and isolate.Johnson argued that Barrett’s confirmation can proceed as long as the Senate takes the proper health and safety precautions.”There’s no reason we can’t confirm Judge Barrett,” Johnson said, cautioning that the confirmation hearings could be held “electronically,” but voting remotely is “probably not possible” since the rules of the Senate would have to be changed.”But If we have to go in and vote, I’ve already told leadership I’ll go in a moon suit,” Johnson said.”Where there is a will, there’s a way,” Johnson said. “We can do these things.”
Users have been posting pictures of gay pride on social media to drown out offensive online content.
Rwanda’s prosecution on Monday said it intends to hold a joint trial of Paul Rusesabagina, whose story inspired the film “Hotel Rwanda,” together with 16 prisoners alleged to be rebel fighters. Rusesabagina, 66, is a founder of the Rwanda Movement for Democratic Change, a coalition of opposition groups, which has an armed wing known as the National Liberation Front. The government accuses the rebel group of killing Rwandans in the country’s north.
President Trump’s re-election campaign is arguing that his COVID-19 diagnosis and subsequent hospitalization should be seen as advantages over his Democratic challenger, former Vice President Joe Biden, who has not contracted the coronavirus, in the lead up to the presidential election.Erin Perrine, the Trump campaign’s director of press communications, told Fox News on Monday that Trump’s bout with the virus is just another addition to his list of “firsthand experiences” — which also includes his career as a businessman and the last several years in the Oval Office — that Biden does not have. > The Trump campaign is now attacking Biden for…not contracting coronavirus.> > “He has experience — now — fighting the coronavirus as an individual. Those firsthand experiences, Joe Biden, he doesn’t have those.” pic.twitter.com/Qk0Qc8l6q9> > — Tim Hogan (@timjhogan) October 5, 2020More stories from theweek.com 4 plausible election scenarios after Trump’s coronavirus diagnosis The pandemic wake-up call America needs Trump is sick. So is the GOP.
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During a segment on Fox News on Monday, Trump campaign communications director Erin Perrine said President Trump battling coronavirus is among a set of attributes that former Vice President Joe Biden doesn’t have.
Tasmanian devils have been released into the wild on Australia’s mainland 3,000 years after the feisty marsupials went extinct there, in what conservationists described Monday as a “historic” step. Aussie Ark, along with a coalition of other conservation groups, revealed on Monday that they had released 26 of the carnivorous mammals into a 400-hectare (1,000-acre) sanctuary at Barrington Tops, about 3.5 hours north of Sydney. Tim Faulkner, president of Aussie Ark, said the “historic” releases in July and September were the first steps in a project akin to the successful move to return wolves to Yellowstone National Park in the United States in the 1990s. After 16 years of work, including the establishment of mainland Australia’s largest Tasmanian devil breeding programme, Faulkner said it was “incredible and surreal” to have reached the goal. “It’s the stuff dreams are made of,” he told AFP.
French authorities deployed about 1,000 firefighters, four military helicopters and troops to search for at least eight people who were missing after devastating floods hit a mountainous border region with Italy, where at least four people were killed. Emergency workers in Italy recovered two corpses Sunday in northern Liguria that they feared may have been washed away as a result of the storms that killed two other people on Saturday. Floods washed away houses and destroyed roads and bridges surrounding the city of Nice on the French Riviera after almost a year’s average rainfall fell in less than 12 hours.
Asked if he had sat down with Fauci in March, Trump reportedly said: ‘Yes, I guess, but honestly there’s not a lot of time for that’Donald Trump said in March he “didn’t have a lot of time” to meet the top public health expert Dr Anthony Fauci for a briefing about the coronavirus outbreak that was then gathering pace, according to a new recording released by the reporter Bob Woodward.The president is now at Walter Reed hospital outside Washington, for treatment after contracting the virus which swept through his White House last week. Nearly 7.5m cases have been confirmed in the US and about 210,000 people have died.On Sunday, Trump, who has been widely criticized for failing to advocate mask-wearing, social distancing and other public health measures to contain the virus, said he had learned a lot. “This is the real school,” Trump said from Walter Reed, to which he was admitted on Friday. “I get it and understand it. [It is] a very interesting thing and I’m going to be letting you know about it.”Trump spoke to Woodward on the record 19 times for the reporter’s book Rage.In one conversation, on 19 March, the president infamously said he “wanted to always play [the virus] down” and said, “I still like playing it down, because I don’t want to create a panic”.In the same call, CNN reported on Monday, the president called Fauci, director of the National Institute of Allergy and Infectious Diseases and a key member of the White House coronavirus taskforce, a “sharp guy” who has “done it before”.Fauci has emerged as a trusted voice on the pandemic, his every interaction or disagreement with Trump frenziedly parsed in the media.Asked if he had sat down with Fauci, Trump said: “Yes, I guess, but honestly there’s not a lot of time for that, Bob.“This is a busy White House. We’ve got a lot of things happening. And then this came up.”
Abbott forced two of Texas’ Democratic strongholds to close a number of drop-off sites which had already opened
An Israeli aircraft struck what the army said was a Hamas military target in the southern Gaza Strip late Monday, shortly after Gaza militants fired a rocket into Israel. The rocket landed in an open area and did not cause any damage or injuries, Israeli media reported. There was no immediate claim of responsibility for the rocket fire.
The global chemical weapons watchdog, which has been asked by Germany to test samples of what Berlin says was a banned nerve agent used to poison a Russian opposition figure, said on Monday its experts would be prepared to assist Russia in the case. The Organisation for the Prohibition of Chemical Weapons (OPCW) said it had received a request from Moscow on Oct. 1 for help in the case of Kremlin critic Alexei Navalny, and was seeking clarification on what type of assistance Russia wanted. Navalny fell ill on a flight in Siberia on Aug. 20 and was flown to Germany for treatment.
Star, Earth, Supernova, Betelgeuse, Red supergiant star
World news – CA – Supernova blasted Earth 2.5 million years ago (and may have triggered an ice age)