Mark Side History

Side projects throughout history and the stories of the men and women behind them.

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April 06, 2025

Martha Coston and her side project: The signal flare

Adam Howell

As a young widow raising four children, Martha Coston pioneered a naval flare system that transformed maritime communication, overcame 19th-century gender barriers, and saved countless lives.

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More Stories

March 30, 2025

Samuel Morse and his side project: The telegraph

Samuel F.B. Morse transformed human communication while pursuing an unrequited artistic dream. His telegraph—conceived amid personal tragedy and developed between canvas stretchers—collapsed distance and time, creating the foundation for our connected world.
Adam Howell
March 23, 2025

Charles Goodyear and his side project: the vulcanization of rubber

While struggling as a failed businessman in the 1830s, Charles Goodyear (1800–1860) became obsessed with fixing rubber's fatal flaw—it melted in summer heat and cracked in winter cold. Despite having no chemistry background, crushing poverty, and repeated imprisonment for debt, his relentless five-year quest led to the accidental discovery of vulcanization…
Adam Howell
March 16, 2025

John Walker and his side project: Matchsticks

In a modest pharmacy in northeastern England, John Walker accidentally revolutionized humanity's relationship with fire. While mixing chemicals after hours, this small-town pharmacist created the first practical friction match—transforming fire-starting from a frustrating daily challenge into a simple action we now take for granted.
Adam Howell
March 09, 2025

Eli Whitney and his side project: The Cotton Gin

Yale graduate Eli Whitney's (1765–1825) modest side project—a simple machine to separate cotton seeds from fiber—sparked an economic revolution that reshaped American industry and society.
Adam Howell
March 02, 2025

Charles Macintosh and his side project: Waterproof fabric

In the rainy streets of early 19th century Glasgow, industrial chemist Charles Macintosh (1766–1843) transformed what others dismissed as worthless waste into the world's first truly effective waterproof fabric.
Adam Howell
February 23, 2025

James Watt and His Side Project: Revolutionizing the Steam Engine

James Watt (1736–1819) transformed a broken model engine into the innovation that would drive the Industrial Revolution. While repairing a miniature Newcomen steam engine at the University of Glasgow in Scotland, Watt identified its fundamental flaw: the cylinder had to be repeatedly heated and cooled…
Adam Howell