From hair collectors to fire grenades, these 18 strange objects from history had surprising—even bizarre—purposes. Prepare to be amazed by what people actually used these for!

The ocean hides many secrets… and sometimes, it gives them back. From Megalodon teeth to mysterious chests, glass balls, and WWII fighter plane remains — here are 12 of the strangest, most mind-blowing things ever found washed ashore. Nature is weird. And...