A new study identifies the defective function of CatSper, an ion channel controlling calcium levels in sperm, as a common cause of seemingly unexplained male infertility. CatSper-deficient human sperm ...

The Minnesota Democrat on the battle between his city and the federal government. By Lulu Garcia-Navarro As I grew older, things about my family’s history began to seem … off. By Kwame Anthony Appiah ...

Jan. 3, 2026 A one-dose oral drug called zoliflodacin has proven highly effective against gonorrhoea in a major international trial. The pill matched the success of current treatments while avoiding ...