Science Friday Initiative
Science Friday: An Astronaut Explores Nasa's Scientific Frontiers
Learn how astronaut and astrophysicist John Grunsfeld leads NASA's investigations of Earth and beyond. This astronaut flown the space shuttle five times, and performed eight spacewalks to service the Hubble telescope. [23:32]
PBS
Pbs Learning Media: Inexpensive Inventions and the World's Poor: Earth Sky
Environmental scientist Ashok Gadgil is perhaps best known for his inventions which include an ultraviolet water purifier that can provide clean, cheap water for a thousand people per day and an inexpensive, ultra-efficient cooking stove...
Science Friday Initiative
Science Friday: Studying Rocks Found on Earth for Clues About Space
We'll take a tour of the Center for Meteorite Studies, and learn how meteorites can teach us about the history of the solar system.