沈阳肤康皮炎专家团队(辽宁毛囊炎沈阳东城毛囊炎医院) (今日更新中)

WASHINGTON (AP) — Winter hit U.S. honeybees hard with the highest loss rate yet, an annual survey of beekeepers showed.The annual nationwide survey by the Bee Informed Partnership found 37.7% of honeybee colonies died this past winter, nearly 9 percentage points higher than the average winter loss.The survey of nearly 4,700 beekeepers managing more than 300,000 colonies goes back 13 years and is conducted by bee experts at the University of Maryland, Auburn University and several other colleges.Beekeepers had been seeing fewer winter colony losses in recent years until now, said Maryland's Dennis vanEngelsdorp, president of the bee partnership and co-author of Wednesday's survey."The fact that we suddenly had the worst winter we've had ... is troubling," vanEngelsdorp said.Some bees usually die over winter, but until the past couple decades, when a combination of problems struck colonies, losses rarely exceeded 10%, he said.Bees pollinate billion worth of U.S. food crops. One-third of the human diet comes from pollinators, including native wild bees and other animals, many of which are also in trouble, according to the U.S. Department of Agriculture."We should be concerned on multiple levels," said University of California, Berkeley, agricultural social scientist Jennie Durant, who has a separate study this week on loss of food supply for bees.Year-to-year bee colony losses, which include calculations for summer, were 40.7%, higher than normal, but not a record high, the survey found."The beekeepers are working harder than ever to manage colonies but we still lose 40-50% each year... unacceptable," Swiss bee expert Jeff Pettis, who wasn't part of the survey, said in an email.For more than a decade, bees have been in trouble with scientists blaming mites, diseases, pesticides and loss of food.This past winter's steep drop seems heavily connected to the mites, vanEngelsdorp said. Beekeepers report that chemicals that kill mites don't seem to be working quite as well and mite infestation is worsening, he said. Those mites feed on the bees' fats and that's where the insects store protein and center their immune response.Durant's study in this week's journal Land Use Policy found that changes in food supply in the Midwest's Prairie Pothole Region, a hot spot for honeybee colonies, has been a major factor in losses. That area has lost wetland areas with clover bees feed on.Other areas have been converted to corn and soy crops, which don't feed bees, she said.As bad as the survey numbers are, vanEngelsdorp said, "We're not really worried about honeybees going extinct... I'm more worried that the commercial beekeepers will go out of business." 2695

WASHINGTON (AP) — The Supreme Court has ruled unanimously that states can require presidential electors to back their states’ popular vote winner in the Electoral College.The ruling, just under four months before the 2020 election, leaves in place laws in 32 states and the District of Columbia that bind electors to vote for the popular-vote winner, and electors almost always do so anyway.So-called faithless electors have not been critical to the outcome of a presidential election, but that could change in a race decided by just a few electoral votes. It takes 270 electoral votes to win the presidency.A state may instruct “electors that they have no ground for reversing the vote of millions of its citizens,” Justice Elena Kagan wrote in her majority opinion.The lawyer for the electors who challenged the state rules told The Associated Press that he’s glad the court acted now.“Obviously, we don’t believe the Court has interpreted the Constitution correctly. But we are happy that we have achieved our primary objective — this uncertainty has been removed. That is progress,” lawyer Lawrence Lessig said. 1123

We are right in the middle of the 2017 Atlantic Hurricane Season and things have really picked up in the tropics. So much so that it has many of you asking, “Why have things suddenly gotten so active?”Well, it’s actually normal to see the tropics so active right now.Hurricane season goes from June 1 until Nov, 30, with the most active months being August and September. The reason these two months see the most activity is because it’s when the waters in the Gulf of Mexico and the Atlantic are warmest, which is a key ingredient for tropical development.As the sun angle gets lower in the northern hemisphere and we head towards winter, the waters in these areas begin to cool which is why we see the numbers drop for October and the final month of November.When it comes to rating these storms, it’s something similar to the Enhanced Fujita Scale – how we rate tornadoes.Hurricane ratings are based off of the Saffir-Simpson Scale, and we rate them by categories: 985

We are heartbroken to hear this sad news about Grant. He was an important part of our Discovery family and a really wonderful man. Our thoughts and prayers go out to his family. ?? https://t.co/5k3GydZCzn— Discovery (@Discovery) July 14, 2020 250

We are all devastated by Emma’s loss and were not prepared for the high cost of a funeral service. We want to give Emma the memorial she deserves, to honor her memory and say our last goodbyes. I am currently asking for donations to help cover the cost of Emma’s funeral. 280

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