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Mammals can breathe through their intestines May. 14, 2021 , 11:20 AM On a good day, things exit through the anus. But in rodents and pigs in respiratory distress, oxygen can be absorbed by tissues in the rectum, helping the animals recover, a new study suggests. The scientists behind the research propose that flushing oxygen into the rectum could one day help save human lives if conventional ventilation methods are unavailable. “It looks like a crazy idea,” says Sean Colgan, a gastroenterologist at the University of Colorado, Boulder, who was not involved in the study. “But if you look...

The numerals in the illustration show the main mutation sites of the B.1.1.7 variant first detected in the U.K., which is more transmissible than other variants. Here, the virus's spike protein (red) is bound to a human cell (blue). Juan Gaertner/Science Source Back in the fall, Tom Wenseleers made a bold claim on Twitter. He tweeted that the new coronavirus variant emerging in the U.K. was more transmissible — or could spread more quickly — than over versions of the virus. "I posted a graph [on Twitter] showing the U.K. variant had a transmission advantage over the other type...

Science’s COVID-19 reporting is supported by the Heising-Simons Foundation. A team of prominent scientists has doubled down on its controversial hypothesis that genetic bits of the pandemic coronavirus can integrate into our chromosomes and stick around long after the infection is over. If they are right—skeptics have argued that their results are likely lab artifacts—the insertions could explain the rare finding that people can recover from COVID-19 but then test positive for SARS-CoV-2 again months later. Stem cell biologist Rudolf Jaenisch and gene regulation specialist Richard Young...

Scientists are spotting new coronavirus variants almost on a daily basis. So far public health experts are still most worried about three important ones.

Mon, 15 Feb 2021 18:00 UTC A new study blames a comet fragment for the death of the dinosaurs 66 million years ago. But most experts maintain that an asteroid caused this cataclysmic event. © Roger Harris/Science Source An artist’s rendering of the impact event 66 million years ago that ended the reign of dinosaurs. In one searing apocalyptic moment 66 million years ago, Earth was transformed from a lush haven into a nightmare world with a fiery wound that bled soot into the skies. The extraterrestrial object that slammed into our planet spelled doom for dinosaurs and countless other speci...