Bad Bunny's enormous success; First fully synthetic mouse embryos : Here & Now What's behind Bad Bunny's enormous success? "Un Verano Sin Ti," the new album by the Puerto Rican superstar, is dominating the music industry. Carina del Valle Schorske, a writer who profiled Bad Bunny in The New York Times Magazine, joins us. And, for the first time in history, researchers have grown mice embryos with no sperm, no egg and no uterus. STAT's Megan Molteni joins us.