Some of history's most notable individuals were high achievers at a surprisingly young age. Many of the men and women on this list - ranging from emperors to film stars and chess players - began their careers as children; others boasted significant accomplishments in young adulthood. All of them did something noteworthy before the age of 25.
Want to feel old? Read on to find out just how young some of history's biggest talents were when they started to accomplish great things.
Born in France in 1809, Louis Braille was blinded at the age of just 3 years old. Braille didn't let his condition limit what he could do, however.
While a student at the Royal Institute for Blind Youth in 1824, Braille met Charles Barbier, an officer who had developed "sonography," a system of written communication based on raised dots.
Though Barbier had developed his system with the French Army in mind, 15-year-old Braille believed a similar method could be used by people who were blind - and so he went to work creating what is now known as "braille."
One of the most legendary conquerors got his start as a teenager. Alexander - not yet "the Great" - was born in 356 BC into the Macedonian royal family.
When Alexander was 16, his father, Philip II, went away on a military campaign and put the kingdom in Alexander's hands. Alexander marked the occasion by leading the Macedonians to victory against the Thracians and acquiring the first part of what would become a vast empire.
- Photo: Unidentified (Ensian published by University of Michigan) / Wikimedia Commons / Public Domain
Jean Piaget, one of the most important child psychologists of the 20th century, showed signs of brilliance from a young age. Swiss-born Piaget got his scholarly start when he wrote an article about the albino sparrow at the age of 11, which many see as the beginning of his publishing career.
A mathematical and scientific mind for the ages, Blaise Pascal was only 19 when he built what is considered to be the "first digital calculator," the Pascaline, in the 17th century.
What inspired the teenaged Pascal to create the device? His father was a tax collector, and Pascal wanted to build a device to help him in his calculations.