Forty years after Chernobyl, more nuclear disasters are inevitable — plan for them

How far the Milky Way's disk extends has long been difficult to define—it doesn't end sharply, but fades away gradually at its outer edges. Now, for the first time, an international team of astronomers has identified the edge of the Milky Way's star-forming disk by studying the ages of stars, revealing that the bulk of our galaxy's star formation occurs within 40,000 light-years of the Galactic Center.

An Iranian propaganda video depicts Donald Trump, Netanyahu and Satan as Lego figurines, the White House combines real footage of airstrikes with clips from films and video games, and the American president shares AI-generated videos of himself as a fighter pilot. It sounds like satire, but it is the new reality of political manipulation. Researchers call this phenomenon "slopaganda."