Neutron Scanning Solves A 350-Year-Old Scientific Controversy

New Species Fills Billion-Year Gap in Evolution of Cyanobacteria

On this day in 1796, the physician Edward Jenner administered an inoculation derived from cowpox pus into the arm of 8-year-old James Phipps. Jenner's hypothesis that exposure to the relatively mild cowpox virus conferred immunity against smallpox helped develop the modern-day vaccine.

Scientists Prove That Neutron Stars Aren’t Squishy