Our World: Changing Theories - The Scientific Method in Action
See how scientists develop ideas about the universe, then set out to prove what they think is right. Often this search leads to new questions and new discoveries. Find out how the Mars Phoenix Lander has changed what NASA scientists believe about Mars. Since the production of this video, NASA has learned more about Mars through these missions: Mars Reconnaissance Orbiter, Mars Science Laboratory (Curiosity), Mars Orbiter Mission, and MAVEN.
Published on: March 19, 2013