九江安全带保护作用体验装置(大庆新能源光伏发电教学实验箱) (今日更新中)

A California couple watching TV at home Sunday evening got an unwelcome visitor: a mountain lion that wandered in through their open door.Edward and Kathy Sudduth of Sonora heard a loud slam and were soon met by the big cat, which they think must have been chasing a neighbor's pet. It took them a moment to register what was going on, the pair told 362

A "slow-moving blob" that may have been a flock of birds triggered a lockdown of the White House and caused the US Capitol to be placed on "restrictive access" Tuesday morning.Senior national security officials across the agencies convened to coordinate and monitor the situation after the mysterious "blob" was seen on radar at the Capitol Police command center flying just south of the National Mall, according to a law enforcement source.Military aircraft were scrambled in response.Initial assessments indicated that the "blob" was an unauthorized aircraft entering restrictive airspace, leading to the brief lockdown.The airspace around Washington is 668

Scientists are working to eliminate a type of heart disease in dogs using gene therapy. They're zoning in on a heart condition called mitral valve disease that’s common in 6% of dogs. Scientists are using Cavalier King Charles spaniels for the research. They tend to develop it at a younger age. Scientists at Tufts University have already tested gene therapy in mice. A virus is injected into them to deliver DNA to cells which causes them to create a protein. What it essentially does is stops the heart valve from getting thicker, stopping the valve from leaking. Researchers are now moving on to testing this in dogs. But they think the treatment could go beyond just canines. “Many of the dog diseases are naturally occurring and really great models for human disease,” says Dr. Vicky Yang, a veterinary cardiologist and research assistant professor at Cummings School of Veterinary Medicine at Tufts University. “And I can see this, if it becomes successful in dogs, potentially going into thinking about treatment for humans for mitral valve disease.”The biotech company behind the treatment agrees. It says it could also expand beyond heart problems. “I think a larger question, though, is if we are able to prove this thesis of treating aging, making the animal generally healthier, could also treat heart failure, what other diseases could we treat in dogs?” says Daniel Oliver, the CEO of Rejuvenate Bio. “And could we progress this treatment onto past dogs and other animals and possibly humans?” The gene therapy would only be used for dogs just starting to experience heart problems.Researchers still need to make sure the gene therapy is safe for all breeds before they make it available to the public. 1730

145 business leaders have signed a letter demanding the US government take action on gun violence.Their plea, which follows the recent rash of mass shootings, is among of Corporate America's strongest statements yet against America's gun violence epidemic.In a draft letter addressed to the Senate, the leaders demand that lawmakers "support common-sense gun laws" already passed by the House and that "doing nothing about America's gun violence crisis is simply unacceptable." It was 496

A 73-year-old woman in India has given birth to twin girls.Erramatti Mangayamma, a farmer from the southern state of Andhra Pradesh, is believed to be the oldest person ever to give birth.She became pregnant through IVF and doctors delivered the babies via caesarian section Thursday. 296

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