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00:01:23
Mechanical Engineer Armen Toorian explains that the wheel tracks of the Mars rover Curiosity are used to determine how far the rover has travelled on the red planet.

00:03:07
Lead Curiosity Driver Matt Heverly and Research Scientist Bethany Ehlmann elaborate on the unusual working conditions involved with a Mars rover expedition.

00:03:55
Research Scientist Bethany Ehlmann and Mechanical Designer Scott McGinley explain some of the scientific instruments aboard the Mars rover Curiosity.

00:04:50
Engineers at the Jet Propulsion Laboratory (JPL) explain how they simulate martian conditions and conduct tests with model rovers to prepare the Curiosity rover for its journey to Mars and its work on the red planet.

00:01:00
A glimpse of the full-scale model of the Mars rover, Curiosity. On display at the Exploratorium from August 1st to September 16, 2012. This model is on loan from JPL, NASA's Jet Propulsion Laboratory, and there are only two on loan in the United States!

00:05:26
The ground under our San Franciscan feet is constantly on the move. Join Exploratorium educator Ken Finn as we visit some spots around town where exposed rocks reveal the tale of an active earth.

In this video interview from Greenland, geologist Tom Neumann from the University of Vermont explains how he and his colleagues are attempting to read the history of the Greenland Ice Sheet by collecting and analyzing rocks spit out from the base of the glacier.

00:01:17
On his team’s first day out in the field near Kangerlussuaq, geomorphologist Paul Bierman of the University of Vermont explains what kind of rocks they look for to help determine the last time Greenland was free of ice.

00:31:36
The two Mars Rovers are alive and well after surviving their second Martian winter. Come and see photos of discoveries they made during their third year on Mars, with Exploratorium Senior Scientist Paul Doherty.

1:04:26
In this zany competition teachers will have ten minutes to create a science activity from a special secret ingredient. This week: rocks!