For centuries, menstruation was managed with homemade solutions--until the world changed in a hurry. Patented in 1931, the first Tampax tampons were sold in 1936 as the first widely marketed internal menstrual product. Breakthroughs, discoveries, and DIY tips sent every weekday. About half of us will use them at some point in our lives. But few of us like to talk about them, at least in public.

From sugar shortages to military contracts, World War II helped make M&Ms and Hershey's bars into symbols of American abundance. A 1940s Milky Way ad shows candy keeping pilots smiling through the war. Breakthroughs, discoveries, and DIY tips sent every weekday. Every year, Hershey manufactures 373 million of its signature milk chocolate bars . While the company doesn't release exact stats on Halloween sales, you can bet a lot of those end up in plastic Jack O'Lantern-shaped pails.