inventions

The saxophone was patented in 1846 by Adolphe Sax, a man who nearly died 12 times before age 20. Here's how his misfit instrument conquered jazz.

Earle Haas patented the tampon in 1929 and sold it for $32,000. Mary Kenner improved it and was rejected by investors because she was Black. The 1980 TSS crisis changed everything.

Tesla's alternating current system powers every home on Earth today — yet he died broke and largely forgotten. Here's the full story.