Nuclear Testing Not Advised, Trump’s Nominee Says in Senate Hearing

Brandon Williams, President Trump’s pick to become the keeper of the nation’s nuclear arsenal, testified on Tuesday that he would not recommend that Mr. Trump restart explosive testing of the deadly weapons. His statement, during a confirmation hearing before the Senate Armed Services Committee, was unexpected. Other advisers to the administration had proposed that the … Read more

Ideology May Not Be What You Think but How You’re Wired

So sharp are partisan divisions these days that it can seem as if people are experiencing entirely different realities. Maybe they actually are, according to Leor Zmigrod, a neuroscientist and political psychologist at Cambridge University. In a new book, “The Ideological Brain: The Radical Science of Flexible Thinking,” Dr. Zmigrod explores the emerging evidence that … Read more

Who Will Care for Infants With H.I.V. Overseas?

The Trump administration has dismissed the few remaining health officials who oversaw care for some of the world’s most vulnerable people: more than 500,000 children and more than 600,000 pregnant women with H.I.V. in low-income countries. Expert teams that managed programs meant to prevent newborns from acquiring H.I.V. from their mothers and to provide treatment … Read more

Scientists Revive the Dire Wolf, or Something Close

For more than a decade, scientists have chased the idea of reviving extinct species, a process sometimes called de-extinction. Now, a company called Colossal Biosciences appears to have done it, or something close, with the dire wolf, a giant, extinct species made famous by the television series “Game of Thrones.” In 2021, a separate team … Read more