E. histolytica kills at least 50,000 people every year. Microbiologists have a battle plan. By Andrew Paul Published May 12, 2025 3:34 PM EDT Get the Popular Science ...

Blood is far more than just a circulating fluid. It delivers oxygen from the lungs to every cell, removes carbon dioxide, transports nutrients and hormones, and carries waste products to the kidneys.

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...