海口100件装矿物陈列标本(嘉兴声波传感器) (今日更新中)

Astronomers looking at the atmosphere in neighboring Venus see something that might just be a sign of life.In a study published Monday, researchers from Cardiff University, MIT and elsewhere say they found the chemical signature of a noxious gas called phosphine.On Earth, phosphine is associated with life. It's found at the bottom of ponds, in badger guts and in penguin guano.Venus’ phosphine was observed in a narrow, temperate band within the planet’s atmospheres, where temperatures range from 30 to 200 degrees Fahrenheit. Scientists have speculated that if life exists on Venus, this layer of the atmosphere, or cloud deck, is likely the only place where it would survive, according to MIT.“This phosphine signal is perfectly positioned where others have conjectured the area could be habitable,” said the study’s co-author and EAPS Research Scientist Janusz Petkowski.Astronomers tried to figure out other, non-biological ways it could be produced and came up empty.“It’s very hard to prove a negative,” said Clara Sousa-Silva, research scientist in MIT’s Department of Earth, Atmospheric and Planetary Sciences (EAPS). “Now, astronomers will think of all the ways to justify phosphine without life, and I welcome that. Please do, because we are at the end of our possibilities to show abiotic processes that can make phosphine.”Outside experts — and the study authors themselves — say the research is tantalizing but not yet convincing. 1454

Astronauts on board a Soyuz rocket heading to the International Space Station survived an emergency landing following a booster failure, a Russian space official said Thursday."The crew landed," Dmitry Rogozin, director of the Russian space agency Roscosmos, said on Twitter. "All are alive."The rocket was transporting NASA astronaut Nick Hague and cosmonaut Alexey Ovchinin of Roscosmos for a six-month stay on the ISS.NASA said its support teams had reached the location where the crew touched down."The search and rescue teams have reached the Soyuz spacecraft landing site and report that the two crew members are in good condition and are out of the capsule," NASA tweeted.The pair will be taken to the Gagarin Cosmonaut Training Center in Star City, outside the Russian capital, Moscow, NASA said.  818

As the NHL went into what it calls “Phase 2” of its plans to resume the 2019-20 season, the league announced that 23 players tested positive for the coronavirus.The 23 players who tested positive is in addition to 12 players who previously tested positive in early June when the league began “Phase 1” of its reopening plan. All told, the league has had 35 players test positive.So far, the league has administered a total of 2,900 tests, with 396 having been tested so far. The tests have been administered to players representing 24 of 31 teams who will participate in the league’s postseason.The league said it will not identify those who test positive for the virus.The league suspended play in mid-March in an effort to help stop the spread of the virus. The league left off as most teams played roughly 70 games of an 82-game schedule.Days after the league’s shutdown, an Ottawa Senators player became the first player to test positive for the virus.When the league resumes, a tournament be held to conclude the season with games played between two “hub cities.” With coronavirus cases declining in Canada while still on the rise in the US, it is likely the NHL will conclude its season north of the border. 1221

AUSTIN, Texas (AP) — Texas Lt. Gov Dan Patrick says he's offering up to million in defense of President Donald Trump’s unsupported claims of irregularities in the U.S. presidential election. The Republican said Tuesday he would pay out rewards for information that leads to voter fraud arrests and convictions. A former chief Texas ethics regulator suggested that paying reward money, which would come from Patrick’s political campaign, could run afoul of federal campaign finance laws. There's no evidence of widespread fraud in the 2020 election. 559

As she watches her three boys play in the backyard, Acacia Clark can’t help but be consumed by an overwhelming sense of anxiety as she thinks ahead to the coming school year.It’s been a long four months for Clark and her husband, who are both trying to juggle full-time jobs, while at the same time, raise their young kids who haven’t been inside a classroom since March.“My focus on my work has been abysmal,” Clark said, as one of her 6-year-old twin boys asks her for a popsicle. “I’ll get in a few minutes here or there, but it’s been very stressful.”The COVID-19 outbreak meant schools in Newton, Massachusetts, where this family resides, had to be shut down. Across the country, school districts are carefully weighing their options about reopening in the middle of a pandemic.Clark wants her children to have the daily structure of school back in their lives. However, she's also incredibly concerned about someone in her family catching the virus.“What if one of us gets sick? That means the whole house would get sick. Then, how do we work?” she wondered.That is the reality facing countless families across the country.“It’s more than being stuck between a rock and a hard place, it’s just being stuck in a hard place constantly and not having a light at the end of the tunnel,” she added.Families are now having to juggle it all, while at the same time, making sure their kids don’t fall through the cracks.As some school resume in-person learning, many parents like Clark are worried about what could happen if there’s a sudden outbreak and their child’s school is forced to shut down.“I can either work or be there for me kids; I can’t do both,” she said.Recognizing the impossible predicament the pandemic has placed parents in, Congress passed the Families First Coronavirus Response Act back in March. It gives parents two weeks of paid sick leave if you find yourself having to quarantine. Parents also get two weeks of paid sick leave at two-thirds of their regular salary if the child's school or daycare shuts down because of COVID-19. Additionally, it guarantees 10 weeks of leave at two-thirds of their salary if they need to take care of a sick child.But those benefits will run out on December 31.“Employers are recognizing that there has to be a solution. If kids can’t go back to school, parents can’t go back to work full-time,” explained Chris Feudo, an attorney with Foley Hoag in Boston.As the pandemic enters its fifth month in the United States, Feudo says another issue facing parents is that they’ve already exhausted all of their FMLA leave. Because of that, he says parents should talk to their employers as soon as possible if it appears your child’s school or daycare might shut down because of a COVID-19 outbreak.“Come up with a plan and say, ‘This is the most I can do for my employer.’ If you have a thought-out plan, it shows you're being proactive and I think employers will be more responsive to that,” he added.Feudo says if you've run out of FMLA leave and need to ask your boss for more time off to care for family members, it's best to have the conversation in-person, if possible, or via a Zoom or video conference call. He says employers are being more flexible right now because of the outbreak but they need to see that employees are willing to bring up difficult situations before they become major issues.Under federal law, it’s also illegal for employers to retaliate against someone for using FMLA leave.As for Clark, she’s still waiting to find out if her district will have in-person learning this fall and she’s doing her best to manage whatever new challenge the pandemic throws her way.“I don’t know single parents are doing it, especially if they’re trying to bring in a paycheck,” she said. 3762

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