We usually take for granted many of the objects we use every day — we don't think much about how long these things have been around, how they were invented and how people got along without them before that.
Here is a list of the oldest known household objects. Compare them to the things you have at home.
Stop squinting! This 800-year-old pair of sunglasses was discovered in Canada. They're meant to protect the wearer from snow blindness.
This very special artifact is 40,000 years old and was found in southern Germany. It's the oldest musical instrument ever to be discovered. The earliest wind instruments were made from bird bones or mammoth teeth.
Looking at these objects today, they seem very strange and primitive. But who knows? Maybe our smartphones and electric toothbrushes will look the same to the people who find them thousands of years from now!