For Caribbean box jellyfish, learning is literally a no-brainer. In a new experiment, these animals learned to spot and avoid obstacles despite having no central brain, researchers report September 22 ...

Match Day is now just around the corner, scheduled for March 21. That means thousands of fourth-year medical schools are thinking of little else — in fact, it’s a good bet that most students ...

We’re celebrating 180 years of Scientific American. Explore our legacy of discovery and look ahead to the future. Billions of nerve cells send signals coursing through our bodies, serving as conduits ...