Extras

    Video thumbnail: Science Trek Astronauts: What It Takes To Be An Astronaut

    Science Trek

    Astronauts: What It Takes To Be An Astronaut

    Learn more about the history of astronauts in the space program.

    Astronauts: What It Takes To Be An Astronaut

    Video thumbnail: Science Trek The Web Show: Astronauts

    Science Trek

    The Web Show: Astronauts

    Is being an astronaut fun? Find out what it is like to work in space.

    The Web Show: Astronauts

    Video thumbnail: Science Trek Astronauts: Before You Go Into Space

    Science Trek

    Astronauts: Before You Go Into Space

    Find out where astronauts train.

    Astronauts: Before You Go Into Space