Look at your hand. Notice your little finger. Now look at the smallest toe on your foot. For years, the idea has circulated that evolution is gradually getting rid of them because we barely use them.
It sounds logical, but Daniel Lieberman, an evolutionary biologist at Harvard, debunks it with something simple: evolution does not erase body parts just because we use them less. It needs real survival pressure, and that pressure does not exist here. Your little finger still adds strength to your grip; your smallest toe helps you maintain balance while walking. Studies show that toes became shorter to make upright walking more efficient, not to disappear.
Getting rid of those digits today would make your life more difficult, not easier. And without any advantage involved, there is no evolutionary reason for them to go away. The next time you hear this theory, you will know what to say.