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      What Makes Tiny ‘Water Bears’ So Tough? They Quickly Fix Broken DNA.

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      New research finds that microscopic tardigrades are remarkably good at repairing their DNA after a huge blast of radiation.To introduce her children to the hidden marvels of the animal kingdom a few years ago, Anne De Cian stepped into her garden in Paris. Dr. De Cian, a molecular biologist, gathered bits of moss, then came back inside to soak them in water and place them under a microscope. Her children gazed into the eyepiece at strange, eight-legged creatures clambering over the moss.“They were impressed,” Dr. De Cian said.But she was not finished with the tiny beasts, known as tardigrades. She brought them to her laboratory at the French National Museum of Natural History, where she and her colleagues hit them with gamma rays. The blasts were hundreds of times greater than the radiation required to kill a human being. Yet the tardigrades survived, going on with their lives as if nothing had happened.Scientists have long known that tardigrades are freakishly resistant to radiation, but only now are Dr. De Cian and other researchers uncovering the secrets of their survival. Tardigrades turn out to be masters of molecular repair, able to quickly reassemble piles of shattered DNA, according to a study published on Friday and another from earlier this year.Scientists have been trying to breach the defenses of tardigrades for centuries. In 1776, Lazzaro Spallanzani, an Italian naturalist, described how the animals could dry out completely and then be resurrected with a splash of water. In the subsequent decades, scientists found that tardigrades could withstand crushing pressure, deep freezes and even a trip to outer space.In 1963, a team of French researchers found that tardigrades could withstand massive blasts of X-rays. In more recent studies, researchers have found that some species of tardigrades can withstand a dose of radiation 1,400 times higher than what’s required to kill a person.A preflight photo of a marine tardigrade as seen magnified by 40 times under a light microscope.Boothby Lab/ReutersWe 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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      Mother of Dead Baby Found at Phoenix Airport in 2005 Is Arrested

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      The authorities said that genetic evidence was used to find Annie Anderson of Washington State. She will be charged with first-degree murder in the death of her child, who came to be known as Baby Skylar.The dead baby girl was found in a trash bin in a women’s bathroom at main airport in Phoenix on Oct. 10, 2005. Wrapped in newspapers and a towel, the newborn had been stuffed into a plastic bag from a Marriott Hotel, the police said.Detectives immediately began investigating the death of the child, who came to be known as Baby Skylar. A medical examiner determined two days after the baby was found that she had been suffocated and was the victim of a homicide. But leads in the case eventually dried up, and the investigation remained dormant for years.On Tuesday, more than 18 years after the gruesome discovery at Terminal 4 of Phoenix Sky Harbor International Airport, the authorities announced at a news conference that they had identified and arrested the baby’s mother, Annie Anderson, 51, of Washington State, and that she would be charged with first-degree murder in the child’s death.Ms. Anderson was in custody in Washington on Tuesday, and was awaiting extradition to Maricopa County, Ariz., Lt. James Hester of the Phoenix Police Department said at the news conference.Among the few and early leads that the police had was the plastic bag in which the baby’s body had been found. That prompted detectives to investigate Marriott hotels in the Phoenix area, Lieutenant Hester said. But those leads and others proved unsuccessful.Then, in 2019, the Phoenix police partnered with the F.B.I. to use genetic genealogy, an emerging tool in solving cold cases, to look into the Baby Skylar mystery, Lieutenant Hester said.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