Meet at the nose of the Lockheed SR-71 Blackbird in the Boeing Aviation Hangar.

About the Ask an Expert Series: A few times a month at the Steven F. Udvar-Hazy Center, a Museum staff member talks to the public about the history, collection, or personalities related to a specific artifact or exhibition in the Museum. For topics of upcoming Ask and Expert talks at the Udvar-Hazy Center, click here.

 The Twin Peaks are modest-size hills to the southwest of the Mars Pathfinder landing site. They were discovered on the first panoramas taken by the Imager for Mars Pathfinder (IMP) camera on the 4th of July, 1997, and subsequently identified in Viking Orbiter images taken over 20 years ago. The peaks are approximately 30-35 meters (~100 feet) tall. North Twin is approximately 860 meters (2,800 feet) from the lander, and South Twin is about a kilometer away (3,300 feet). The scene includes bouldery ridges and swales or "hummocks" of flood debris that range from a few tens of meters away from the lander to the distance of the South Twin Peak. How to attend