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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

AURORA, Colo. — Three Aurora police officers have been fired in the fallout over a photograph taken near the site where Elijah McClain was arrested, Interim Police Chief Vanessa Wilson announced Friday. McClain died after officers arresting McClain placed him in a carotid choke hold. 292

As the holidays approach, many people are wondering how to safely celebrate. The CDC has urged Americans not to travel for Thanksgiving, and offering guidance for those who still want to go somewhere. Health officials weighed in on whether you need to quarantine before you visit family for the holidays."My own family, we usually have 100 relatives every year at Thanksgiving. Now, clearly, that’s not going to be happening this year. It’s going to be on Zoom for the big family, but I think there are ways that you can celebrate with your smaller family and get together safely, but it's going to take some work and some planning," said Dr. Tanya Altmann, a pediatrician and spokesperson for the American Academy of Pediatrics.Dr. Altmann says there are a number of steps people can take to protect themselves from getting COVID-19 this holiday season. Ideally, everyone would quarantine for two weeks before and after a get-together. Some families may think about switching their kids to remote learning if they are not already doing it."I don’t think its drastic. If you want to get together with elderly grandparents for Thanksgiving, I think keeping your kids home from school for a week and then testing them on day five to seven, assuming everybody is asymptomatic, can make a lot of sense. Again, I would still try to keep them a little distanced from the grandparents," said Dr. Altmann.But what if you can't switch your kids to remote learning? Dr. Altmann says then it won't be a true quarantine, but most schools that are in-person right now are doing everything right."They're masking, they’re distancing, they’re sanitizing and disinfecting, they’re hand washing. So, what we’re seeing is most kids are not catching COVID-19 in the school classroom during the school day, they're catching it at after-school activities, they're catching it on the weekends when they're gathering with friends or their families or doing things that maybe they shouldn’t necessarily be doing," said Dr. Altmann.So, how long should you quarantine last? For medical professionals, a quarantine usually refers to a person who's potentially been exposed but is not showing symptoms. It's a waiting period to help determine infection."I think really the best guidance is to wait that 14-day quarantine period to have some degree of confidence that you’re not going to become infected," said Dr. Beth Thielen, an Assistant Professor of Pediatrics at the University of Minnesota Medical School and an infectious disease physician. Dr. Thielen says, to be extra careful, you could also test yourself seven days into your two-week quarantine."A testing in between without symptoms is somewhat helpful because we also know there are a certain percentage of people who will develop asymptomatic infections and, in particular, this is probably important for children," said Dr. Thielen.However, testing rules and access varies in each state, so it's best to reach out to your local health official or doctor to find out about availability and turnaround times for results."So, I think for some, where now I'm hearing people are waiting days after a test, and so if you're planning to get tested before a trip and it's going to take four to five days to turnaround the test, that could be the entirety of your trip," said Dr. Thielen.Health officials advise erring on the side of caution, especially if you're planning on visiting elderly family members."I think the most important thing is to be really aware of that it's not just your family. 'Oh, we don't want to catch COVID, we might get sick' but that you could spread it to others who are even more vulnerable," said Dr. Altmann.Experts say to take the highest precautions to create the least amount of risk. 3756

As teachers report to work this week at Georgia’s largest school district, the Gwinnett County Public Schools, 260 of them tested positive or reported exposure to the coronavirus, according to multiple reports.Officials told CNN that most of the cases were likely through community spread. "As of last Thursday, we had approximately 260 employees who had been excluded from work due to a positive case or contact with a case," GCPS spokeswoman Sloan Roach told CNN. "This number is fluid as we continue to have new reports and others who are returning to work," she added.The district plans to reopen August 12 after shutting down in March. Nearly 160,000 students attend classes in Gwinnett County.The area saw a rise in coronavirus cases in July, according to public health data. The state of Georgia has averaged over 3,000 new coronavirus cases per day in the month of July."Given the number of COVID cases in Gwinnett we would expect to see positives among our employees based on the community spread in our county," Roach told CNN. 1045

As the pandemic continues, homeless shelters are having to change their approach to meet the needs of families.At least one network of shelters is doing that by trying to prevent homelessness.Family Promise is the largest homeless shelter in the country. Last year, it helped 93,000 people.It provides aid to those who need housing by placing them with community partners within the interfaith community.The executive director in Arizona says the problem right now is these communities are shutting down in the pandemic.“The congregations in the last six months, five and half months, have gotten used to not hosting,” said Ted Taylor, Executive Director of Family Promise Arizona. “We have to get them back into the hosting mode because it is what makes our model work. So, the fear that is at congregations still remains. It is real and it is a very difficult start.”Family Promise says the average cost to rescue a family is ,000 and it takes as long as four months. For Family Promise, it costs ,000 and takes 43 days.While their new effort to prevent homelessness gets up and running, Family Promise says looming evictions require more community support than ever.So far, Family Promise has prevented 10 families from homelessness in Arizona. It hopes to reach 40 by the end of the year.Nationwide, the executive director says the effort to prevent homelessness could reduce the number of people needing a place to stay by 25%. 1445

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