Scientist of the Day

Ulisse Aldrovandi

September 11, 2020

Ulisse Aldrovandi, an Italian naturalist, was born Sep. 11, 1522.  We published a post on Aldrovandi two years ago, and since it was one of our better efforts, we have no wish to tamper with it or replace it.  There are two reasons for this second installment.  The...

Joseph Leidy

September 9, 2020

Joseph Leidy, an American physician and naturalist, was born Sep. 9, 1823. Leidy was a prominent member of the Academy of Natural Sciences in Philadelphia, and he was the first to recognize dinosaur remains in North America. In 1856, Leidy identified some teeth that...

Marin Mersenne

September 3, 2020

Marin Mersenne, a French natural philosopher and priest, was born Sep. 8, 1588. At age 24, Mersenne joined the Order of Minims, and he spent most of his life at the Minim convent off the Place Royale (now the Place des Vosges) in Paris. Upon his cell converged some of...

Joseph Wright

September 3, 2020

Joseph Wright, an English painter, was born Sep. 3, 1734. Usually known as Joseph Wright of Derby, he was one of very few 18th-century British artists to take an interest in natural philosophy, and to make science a focus in his paintings.  Three of his paintings are...

William Mason

September 2, 2020

William Mason, a American mechanical engineer and manufacturer, was born Sep. 2, 1808.   Mason was a whiz at designing machinery, all kinds of machinery, and in 1845, he established a manufacturing plant in Taunton, Mass., and began producing a variety of machines for...

Laurent Cassegrain

August 31, 2020

Laurent Cassegrain, a French instrument maker, died Aug. 31, 1693, at the age of about 64. Cassegrain, whose name is well known to amateur telescope makers, is the most shadowy of historical figures; we didn’t even learn his first name until 1997.  In 1672,...