Sophia Lewis

Despite staunch resistance from his opponents in the government, the anticorruption crusader Bernardo Arévalo was inaugurated early Monday morning as Guatemala’s president, a turning point in a country where tensions have been simmering over widespread graft and impunity.His inauguration had been scheduled for Sunday, but members of Congress delayed it, and concerns persisted about whether it would happen at all. But after an international outcry and pressure from protesters, Mr. Arévalo was sworn in shortly after midnight, becoming Guatemala’s most progressive head of state since democracy was re-established in the 1980s.His rise to power — six months after his victory…

There is a problem with the recently approved Alzheimer’s drug, Aduhelm. It can remove some of the amyloid that forms brain plaques that are hallmarks of the disease. But most of the drug is wasted because it hits an obstacle, the blood-brain barrier, that protects the brain from toxins and infections but also prevents many drugs from entering.Researchers wondered if they could improve that grim result by trying something different: they would open the blood-brain barrier for a short time while they delivered the drug. Their experimental method was to use highly focused pulses of ultrasound along with tiny gas…

It was late September when Naomi Osaka, the four-time Grand Slam champion and transcendent star of her sport, finally got on the phone with her former coach to talk about her next comeback. Wim Fissette is a cerebral Belgian who thinks long and hard before taking on a player, even one with a resume like Osaka’s. He had one, very serious question.Is it going to be different this time?There was then another conversation, with Florian Zitzelsberger, a 34-year-old German who is one of the most respected strength and conditioning coaches in the world. Zitzelsberger had worked with Osaka before, too. He…

A volcano in Iceland erupted on Sunday after hundreds of earthquakes shook the Reykjanes peninsula, prompting evacuations in a town near where a fissure opened up and spewed lava last month.The eruption happened at about 8 a.m. local time near Sundhnjúkar north of the town of Grindavik, according to local news media and the nation’s civil defense agency. Magnus Tumi Gudmundsson, a volcanologist who advises the civil defense agency, said he was boarding a Coast Guard helicopter to fly over the eruption, some 10 minutes after it was reported to have started.At least 200 earthquakes struck the area near Grindavik,…