James Edward Keeler, an American astronomer, was born Sep. 10, 1857, in Illinois, moving to Florida after the Civil War. He had a mechanical gift ...

Joseph Leidy, the first great paleontologist of the United States, was born on Sep. 9, 1823. He was a Philadelphian and was associated with the...

Henrik Grønvold, a Danish illustrator and naturalist working in England, was born Sep. 6, 1858. He moved to London in 1892, intending to move on to...

François-Sulpice Beudant, a French geologist and mineralogist, was born Sep. 5, 1787, in Paris. He attended the École Polytechnique and...

The USS Shenandoah, a U.S. Navy rigid airship or dirigible, first took to the skies on Sep. 4, 1923. It was a huge thing, 680 feet long, powered by...

Paul Kane, a Canadian painter, was born Sep. 3, 1810, in Ireland. He moved with his family when he was 9 years old to York (now Toronto)...

Jacobus Henricus van 't Hoff, Jr., a Dutch chemist, was born Aug. 30, 1852, in Rotterdam.  He studied chemistry in Delft and Leiden, spent a year ...

The Kinzua viaduct, a wrought-iron trestle railroad bridge in northwestern Pennsylvania, opened for traffic on Aug. 29, 1882. This spectacular ...

Vladimir Grigoryevich Shukhov, a Russian structural engineer, was born Aug. 28, 1853.  Shukhov was an amazingly innovative and prolific engineer...

Thomas Streete, an English astronomer, was born Mar. 25, 1622, and died Aug. 27, 1689, at the age of 67.  Streete grew up during a tumultuous age ...

Fra Mauro, a Venetian monk and cartographer, was born around 1400 and died about 1460.  He was a member of the Camaldolese order of hermits and ...

When Napoleon invaded Egypt in July of 1798 with 54,000 soldiers and sailors, his immediate problem was gaining control of Cairo, which he ...