Netflix! i feel like it is only a few years old but it was invented in 1997
Social media – wealthy ancient Romans had a system where they used slaves as scribes and messengers in order to share gossip and art/poetry and news updates with friends in their social circle.
Contact lenses.
Leonard da Vinci had the idea of contact lenses in 1508 and the first successful contact lenses were made in 1888.
The food at the back of your cupboard.
Betty White.