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Marne Ventura

Have you ever stared into the night sky, full of stars and planets? As a kid, Neil deGrasse Tyson was star-struck when he first visited a planetarium. The universe was calling him. 

Tyson pursued his interest in astronomy and studied to be an astrophysicist. In 1996, he became the director of New York's Hayden Planetarium. He is passionate about teaching people about the universe. Known for making science fun and easy to understand, he has hosted and appeared on TV shows such as Nova ScienceNow and The Daily Show with Jon Stewart. He even has more than one million Twitter followers! But how did he get there? Follow his path from fascinated kid to popular space expert.

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Astrophysicist and Space Advocate Neil deGrasse Tyson

Douglas Hustad

Do you enjoy visiting animals at the zoo or playing with pets? As a child, Jane Goodall loved watching and interacting with animals. As an adult, she became a scientist working with chimpanzees in Africa.

Goodall used unconventional research methods to observe chimpanzees in East Africa. She studied the chimpanzees' behavior and revealed their tool-making abilities. As Goodall grew older, she turned her attention to raising awareness about endangered species and inspiring individuals around the globe to take action. She is one of the world's best-known scientists and activists. But how did she get there? Find out how Goodall's passion for animals helped her become the face of conservationism.

Animal Scientist and Activist Jane Goodall

Margaret J. Goldstein

Have you ever dreamed of going to outer space? When Sally Ride was a little girl, she watched on TV as astronaut John Glenn launched into space. Twenty years later, she became the first American woman to go to space.

Ride had loved science since she was young. Some of her teachers thought she was wasting her time studying science, but she went on to earn her PhD in astrophysics anyway. When NASA's astronaut training program opened to women, Ride quickly applied. Some people thought women couldn't handle space flight. But Ride worked hard and proved them all wrong. Later, she became a physics professor and started her own business to encourage young people to study science. Learn more about Ride's career as a NASA astronaut and educator.

Astronaut and Physicist Sally Ride

Kari Cornell

Do you like to gaze at the stars? So did the young Stephen Hawking. Eventually, he turned his fascination with the night sky into a career of trying to figure out how the universe began and how it works.

As a child, Hawking loved the stars and he loved math class. In college, he studied physics and cosmology, or how the universe came to be. But then he was diagnosed with amyotrophic lateral sclerosis (ALS), a disease that shuts down the nerves that control muscles. His doctors thought he had two years to live, so Hawking started working hard to meet his goals. He studied black holes and made discoveries that earned him recognition around the world. He wrote several books about the universe to help people understand his ideas. More than fifty years after his diagnosis, Hawking still has ALS, but he continues to ponder the night skies, trying to find one theory that will explain the universe.

Theoretical Physicist Stephen Hawking

Katie Marsico

Have you ever used your imagination to solve a problem? When Albert Einstein was young, he was fascinated by the way magnetism made a compass work. As an adult, he used thought experiments to solve some of the universe's greatest mysteries. Einstein loved to think about math and science. He worked for a while at a patent office, but his mind wasn't focused on inventions. Instead, he thought about the universe. In 1905, Einstein's Special Theory of Relativity solved questions that scientists had grappled with for hundreds of years. Learn how Einstein's imagination became a powerful tool that helped him understand the nature of space and time.

Genius Physicist Albert Einstein

Do you play computer games? If you do, you've probably played Minecraft. When Minecraft creator Markus Persson was young, he wasn't very interested in the games themselves. He was more interested in the programing instructions in the computer's manual. By the time Persson was eight years old, he was writing code for his own computer games.

When he was eighteen, Persson landed his dream job as a video game programmer. In 2009, he designed Minecraft in a single weekend. In the game, players use blocks to build whatever they choose. Persson wanted to let players use their imaginations, and the idea paid off. Today, Minecraft is one of the most popular computer games in the world. Although Persson doubts he will ever top this success, he continues to develop games, while fans wait for what's next.

Minecraft Creator Markus "Notch" Persson

Heather E. Schwartz

What do you want to be when you grow up? When Katherine Johnson was young, women weren't expected to go into the math and science fields. Johnson loved math, but she never thought she could be a mathematician. After studying math in school and teaching for a few years, she learned that the organization that would later become NASA was hiring women to complete mathematical equations. As an African American woman, Johnson had to work hard to earn the respect of her coworkers, but they soon came to rely on her brilliant calculations. Her contributions to the US space program helped send astronauts to the moon. Learn how Johnson broke barriers as a female African American mathematician.

NASA Mathematician Katherine Johnson

Do you think science is fun and exciting? Bill Nye does. In fact, he wanted to become an astronaut, but NASA rejected his applications. Instead, Nye has spent his career helping other people understand science and showing them how cool science can be.

Nye went to college to become a mechanical engineer, and he got a job working for an aircraft company. But soon, he began focusing more and more on a career in comedy. Eventually, he got his own popular TV show, called Bill Nye the Science Guy. Through songs, skits, and jokes, Nye taught a generation of young people that science is fascinating and important. Learn more about Nye's career as a comedian, TV personality, and passionate science educator.

Science Educator and Advocate Bill Nye

Patricia Wooster

Have you ever watched a home video that went viral on the Internet? Then you've probably heard of the company YouTube. 

YouTube was created by Steve Chen, Chad Hurley, and Jawed Karim in 2005. When these three friends wanted to share a video from a party, they realized they were on to something. They thought other people would want an easy way to share videos online too. The website they built quickly became the most popular online video community in the world. But how did they go from tech-savvy young adults to founders of one of the Internet's most visited sites ? Discover how Chen, Hurley and Karim came together to build an international platform for video sharing.