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Bird populations in the United States and Canada have dropped by 29% since 1970, signifying 2.9 billion birds lost in almost 50 years, according to a new study.The scientists involved in the study warn that like a canary in a coalmine, birds reveal environmental health. This steep loss of bird populations, including some of the most common birds like sparrows and finches, shows that human impacts on the continent's environment mean it can no longer support the wildlife systems it once did.Normally, it's hard to track animal populations this way. But birds are much easier to monitor. The study combines almost 50 years of data, including information collected by citizen scientists and weather radar data of migratory birds from 143 stations across North America. Observations by people were shared with the North American Breeding Bird Survey at the US Geological Survey, the Canadian Wildlife Service, the Audubon Christmas Bird Count and Manomet's International Shorebird Survey."Citizen-science participants contributed critical scientific data to show the international scale of losses of birds," said John Sauer, study co-author at the US Geological Survey. "Our results also provide insights into actions we can take to reverse the declines."The study was published Thursday in the journal 1315

Bernie Sanders was released from a Las Vegas hospital on Friday, two days after being admitted due to a heart attack, Sanders' medical team said.Campaign spokesperson Jeff Weaver said on Wednesday that Sanders experienced chest discomfort at a campaign event Tuesday night. He later went to the hospital to have two stents inserted. Events with Sanders since then have been canceled. Sanders' campaign said on Thursday that he intends on attending the Democratic debate in Ohio on Oct. 15. "He'll take a few days to rest, but he's ready to get back out there and is looking forward to the October debate,” Sanders' wife Jane Sanders said on Thursday.“After presenting to an outside facility with chest pain, Sen. Sanders was diagnosed with a myocardial infarction. He was immediately transferred to Desert Springs Hospital Medical Center," Sanders’ treating physicians Arturo E. Marchand Jr., MD and Arjun Gurura, said in a joint statement.“The Senator was stable upon arrival and taken immediately to the cardiac catheterization laboratory, at which time two stents were placed in a blocked coronary artery in a timely fashion. All other arteries were normal."A myocardial infarction is more commonly known as a heart attack. 1238

As @GretaThunberg said, “We have to act like our house is on fire, because it is.” @JaneFonda, activists, Indigenous leaders, experts, & community members are answering the alarm sounded by youth to demand action on the climate emergency.Join us for #FireDrillFriday ?? pic.twitter.com/XXanwTQs2w— Fire Drill Fridays (@FireDrillFriday) October 11, 2019 368

Boeing unveiled an overhaul Wednesday to a software system and the pilot training of its signature 737 MAX plane, marking its most direct attempt to fix an element of the plane's original design that investigators believe led to two recent crashes.At the company's plant in Renton, Washington, where the plane is assembled, Boeing pilots ran through scenarios on a flight simulator that was transmitted live into a conference room where regulators and some 200 pilots from client airlines were gathered, according to Mike Sinnett, Boeing's vice president for product strategy. The guests were able to request test simulations."We're working with customers and regulators around the world to restore faith in our industry and also to reaffirm our commitment to safety and to earning the trust of the flying public," Sinnett said. "The rigor and thoroughness in the design and testing that went into the MAX gives us complete confidence that the changes we're making will address any of these accidents."The gathering came at a 1038

Bushland Independent School District in Amarillo, Texas, is taking an unusual step to promote a drug-free environment in its schools.Starting this fall, any seventh- through 12th-graders who request a school parking permit or participate in extracurricular activities -- including sports, band, the student council and chess team -- must pass a drug test."We've discussed drug testing policy for about a year now, and the board wants to be proactive," Bushland Superintendent Chris Wigington 504

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