Es posible que la protección de las vacunas menos eficaces contra la COVID-19 se desvanezca con más rapidez. La vacuna de Sinopharm tal vez ya esté mostrando algunas señales de este declive. Los ensayos clínicos indican que tiene una eficacia del 78 por ciento, pero los Emiratos Árabes Unidos y Baréin ya están ofreciendo refuerzos […]
Dr. Adam Zeman didn’t give much thought to the mind’s eye until he met someone who didn’t have one. In 2005, the British neurologist saw a patient who said that a minor surgical procedure had taken away his ability to conjure images. Over the 16 years since that first patient, Dr. Zeman and his colleagues […]
In December, British researchers discovered that a new variant was sweeping through their country. When it arrived in other countries, the variant, now known as Alpha, tended to become more common in its new homes as well. By April, it had become the dominant variant in the United States, and it has remained so ever […]
Dr. Keeling noted that last year’s drop in annual emissions was too small to be detected in the atmospheric data, since it can be overshadowed by natural fluctuations in carbon emissions from vegetation and soil in response to seasonal changes in temperature and soil moisture. Scripps scientists have previously estimated that humanity’s emissions would need […]
“The dog!” Mark Bezos said during the talk. “I was stunned with jealousy. Here was some lawyer or money manager who, for the rest of his life, gets to tell people that he went into a burning building to save a living creature, just because he beat me by five seconds. As the second volunteer […]
Robyn and Stuart Mackenzie, riding motorbikes one day in 2006 on their vast sheep and cattle farm in the Australian outback, spotted a pile of what looked like large black rocks. On close inspection, they appeared to be dinosaur bones. An even closer inspection, with the help of paleontologists who were part of a new […]
And then, of course, there are the inevitable privacy concerns. Kinsa emphasizes that all data provided to the city will be aggregated and anonymized. “None of the individual data is going to anyone other than to that individual,” Mr. Singh said. “They own the data, and we’re really adamant about this.” While digital privacy experts […]
Bdelloid rotifers may be the toughest, tiniest animal you’ve never heard of. The microscopic, multicellular creatures have complex anatomies and are one of the planet’s most radiation-resistant animals. They can withstand extreme acidity, starvation, low oxygen and years of dehydration. “They’re the world’s most resistant animal to just about any form of torture,” said Matthew […]
Artificial intelligence is gradually catching up to ours. A.I. algorithms can now consistently beat us at chess, poker and multiplayer video games, generate images of human faces indistinguishable from real ones, write news articles (not this one!) and even love stories, and drive cars better than most teenagers do. But A.I. isn’t perfect, yet, if […]
Lights have gotten smaller over time, and “any given intensity appears brighter if it’s emitted by a smaller apparent surface versus a larger one,” said Daniel Stern, chief editor of Driving Vision News, a technical journal that covers the automotive lighting industry. “Tall pickups and S.U.V.s and short, small cars are simultaneously popular,” he added. […]
