On April 15, 1452, Leonardo da Vinci was born. Without formal education, he recorded much of his interest in every facet of life and study. He was an observational scientist who tried to understand something by illustrating and describing it, taking joy in quiet,…
On March 17, 2002, NASA launched the GRACE twins, two Gravity Recovery and Climate Experiment satellites. They flew about 220 km ( 137 mi ) apart in a polar orbit at 485 km (300 mi) above Earth, measuring regional areas of its gravity field,…
On February 23, 1879, British botanist Agnes Arber was born. From her mid-teens through early career, she was able to spend time assisting plant morphologist Ethel Sargant from whom she acquired her research interest and style of investigation. Arber taught at University College, London,…
On February 14, 1852, Dr. Charles West opened London England’s The Hospital for Sick Children. It was the first hospital in the country to provide inpatient care only to children. West was determined to reduce the approximate 20,000 children’s deaths occurring yearly in the…
On February 2, 1997, World Wetlands Day was first celebrated. Grown from an international convention held in Ramsar, Iran, on the present and future of the world’s wetlands, the organization is headquartered in Switzerland. Each year on this date, government agencies, citizen groups, and…
On February 1, 1811, Bell Rock Lighthouse shone its first mirrored light. On this first night, its light could be seen for over 24 km (15 mi). This is remarkable to imagine since the light originated from a single argand oil lamp with a…
On January 4, 1809, inventor and educator Louis Braille was born near Paris. He played and “helped’ his father who made harnesses and other leather goods in his workshop. On one fateful day, playing with an awl, a sharp, pointed tool for piercing leather,…
On December 30, 1863, American physician and bacteriologist William Hallock Park was born. He specialized in nose and throat diseases in New York City and soon became interested in the new science of bacteriology. In NYC, a lengthy epidemic of diphtheria had become the…
On December 26, 1791, English mathematician and pioneer computer scientist Charles Babbage was born. He spent much of his life trying to plan and build a machine that would make as many calculations as possible. Error free, of course. He had read about the…
On December 17, 1972, the recovery ship USS Ticonderoga picked up the Apollo 17 command module from the Pacific Ocean. The splashdown, a return-to-Earth routine of manned spacecraft in that day, marked the capping moment of the capping mission of the Apollo manned lunar…