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Google, thanks to the tens of billions of dollars it makes every year from its online search business, has long pursued giant research projects that could one day change the world. On Wednesday, the Nobel Prize committee conferred considerable prestige to Google’s pursuit of big ideas. Demis Hassabis, the chief …

An eruption of particles from the sun collided with Earth on Thursday morning. The Space Weather Prediction Center, part of the National Oceanic and Atmospheric Administration, reported that the solar particles, which were ejected on Tuesday evening, arrived at 11:15 a.m. Eastern time, traveling at nearly 1.5 million miles per …

Wildlife populations around the world continue dropping precipitously, according to an important but limited and often misinterpreted assessment that’s issued every two years. The declines reported by the Living Planet Index, a collaboration between two large conservation organizations, have been so steep as to feel disorienting. This year is no …