Learn about the history of science by reading about the significant scientific events that took place on this day in history.
2004 - James Francis "Frank" Pantridge died.Pantridge was an Irish cardiologist who invented the portable defibrillator. He discovered approximately half of the men under the age of 65 who had a heart attack died within the first hour of their attack and of those, most suffered ventricular fibrillation. He built and installed his first device in an ambulance and greatly improved the survivability of heart attacks. The defibrillator was quickly adopted by emergency services around the world.
1838 - Clemens Alexander Winkler was born.
Winkler was a German chemist who discovered and isolated the element germanium. Germanium was a hole in Mendeleev's periodic table that he named ekasilicon. Winkler discovered the new element while investigating the mineral argyrodite that was mainly composed of sulfur and silver.
1825 - Felix Hoppe-Seyler was born.
Hoppe-Seyler was a German chemist who was a pioneer of biochemistry and molecular biology. He investigated fluids of the body such as blood, hemoglobin, pus, bile, milk, and urine. He was the first to crystallize hemoglobin and observe its absorption spectrum.
1624 - Simon Marius died.
Marius was a German astronomer who was one of the first to use a telescope. He had a dispute with Galileo for priority of the discovery of Jupiter's four largest moons. He did not receive the credit, but his names: Io, Europa, Calisto, and Ganymede are still used today. He also recorded observations of the 'nebula' Andromeda noting it got brighter in the center than the edges. Today, we know Andromeda is a nearby galaxy.