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    The Tick Situation Is Getting Worse

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    As temperatures rise, ticks of all kinds are flourishing in ways that threaten people’s health.Lately, Shannon LaDeau and her colleagues have had unwelcome visitors at their office in New York’s Hudson Valley: ticks, crawling up the building and trying to get through doors.“Which is kind of alarming,” said Dr. LaDeau, a disease ecologist at the Cary Institute of Ecosystem Studies who studies the arachnids and the pathogens they carry.As winters get warmer, ticks of several kinds are flourishing. Deer ticks, known for transmitting Lyme disease, are moving farther north. The longhorned tick, which came from overseas, has gained a foothold on the East Coast and begun moving west. Gulf Coast ticks have made it to states like Connecticut and Indiana. The lone star tick, which can make people allergic to red meat, is fanning out from the South and has been found as far as Canada.And even in places long accustomed to them, ticks are becoming more numerous and active for longer stretches of each year.Why is this happening, and how can you protect yourself? We asked the experts.What changes are researchers seeing?Marc Lame, an entomologist and clinical professor emeritus at Indiana University’s School of Public and Environmental Affairs, put it simply: “There are more and different types of ticks around than there used to be, and I don’t see that stopping anytime soon.”The spread of individual species can be difficult to track. The longhorned tick, for example, was not identified in the United States until 2017, but a recent study confirmed that it was here as early as 2010.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      Boot Found at Everest Could Be From Sandy Irvine, Who Vanished 100 Years Ago

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      When Sandy Irvine went on a pioneering expedition to Mount Everest’s summit in 1924, he and his partner vanished. The recent discovery may shed light on the ill-fated adventure.A well-preserved boot found by a group of climbers on Mount Everest could be a clue to solving one of the most enduring adventure mysteries in the history of exploration of the world’s highest peak.The climbers who made the discovery in late September have reason to believe that it could contain some of the remains of Andrew Comyn Irvine, 22, whose ascent with an expert climber in an attempt to be the first to reach the summit in 1924 led to their disappearance.The recent explorers, from a National Geographic film crew, were on a glacier below the north face of Everest when they spotted a brown leather boot sticking out of the ice.Looking closer, they noticed a sock with a patch sewed to it that spelled “A.C. Irvine” in stitched red letters.“We just kind of walked around, like for a few minutes, being like, ‘Are you kidding me?’” Jimmy Chin, a mountaineer and filmmaker, said of the find. “We just stumbled upon one of the great discoveries of our time.”In April 1924, Mr. Irvine, a talented engineer but inexperienced climber from Birkenhead, England, who was better known as Sandy, joined George Mallory, a British mountaineer renowned for having reached 27,000 feet above sea level on Mount Everest in 1922.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      Ruth Glacier in Alaska Hides America’s Deepest Gorge

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      As his bush plane circled the craggy peaks of the Alaska Range, the explorer Bradford Washburn peered down and had a burning thought.Coursing down the southern slopes of Denali and Mount Silverthrone were the accumulated snows of thousands of winters, compacted under their own weight into colossal rivers of ice that filled the valleys for miles in every direction. At one particular spot in the white wilderness, Washburn noticed from above, all this glacial mass was somehow squeezing through a granite-walled corridor just a mile wide.Washburn became convinced, he wrote, that beneath the ice lay a secret: The corridor was deep. Deeper, perhaps, than any other gorge on the continent, and maybe even the planet.That was 1937. Nearly 90 years later, a team of scientists set off into the windswept mountains to measure the glacier with snowmobiles and ice-penetrating radar. It wasn’t easy: The Great North does not surrender its mysteries readily. The researchers almost didn’t think they’d found anything of interest.The Ruth Glacier originates beneath the summit of Denali and flows through deep granite valleys.Now, thanks to some clever analysis, and a bit of luck, they have put forth the most conclusive evidence yet that Washburn was right — that the area could be the deepest gorge in North America.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More