Incredible Pictures of Old Celebrities and Their Younger Selves

Robert Downey Jr.

Robert Downey Jr. started his career at just five-years-old. He starred in Pound, which was a movie that was both written and directed by his father. If it weren't for his A-list parents, Downey Jr. probably wouldn't be in the place he is today. Downey Jr. starred in dozens of hits in the 1980s, but he struggled to remain relevant in the 2000s until he was cast as Iron Man.

The More You Know

There are snakes with two heads, which compete with each other for food.
The smallest bone in your body is in your ear.
Arkansas hosts the annual World Championship Duck Calling Contest.
The stars and flashes of light you see when you rub your eyes are called "phosphenes."

Post originally appeared on Upbeat News.