Today’s Google Doodle Honors Julius Lothar Meyer, Who Developed the Periodic Table Meyer and the chemist Dmitri Mendeleev both published research that led to the development of the modern-day periodic table of elements. By Helen Holmes
This Week in Tech History: Leap Day Origins, Pioneer 10 Space Probe Launched Leap Day was initially instituted by a jealous Roman emperor, but it was later backed up by science. By John Bonazzo