Interview with the Expert: Sharon Wilson Purdy

For planetary geologist Sharon Wilson Purdy, life on earth sparked an interest in life on Mars. Her ongoing research could one day answer the question: Is there life on Mars? (1:13)

Latest Videos

Preview thumbnail for video'From Aerial America: How did a grizzly bear get on California’s flag?
From Aerial America: How did a grizzly bear get on California’s flag? (3:22)
Preview thumbnail for video'Daniel Boone’s Wilderness Road
Daniel Boone’s Wilderness Road (3:14)
Preview thumbnail for video'Aerial America: Amazing Destinations
Aerial America: Amazing Destinations (2:25)
Preview thumbnail for video'A Pearl Harbor veteran tells his harrowing story of survival
A Pearl Harbor veteran tells his harrowing story of survival (2:32)
Preview thumbnail for video'Death in the Arctic
Death in the Arctic (3:46)
Preview thumbnail for video'Witness to disaster
Witness to disaster (2:05)
Preview thumbnail for video'The legacy of the Tuskegee Airmen
The legacy of the Tuskegee Airmen (1:31)
Preview thumbnail for video'Two women who lost families in the same plane crash meet
Two women who lost families in the same plane crash meet (3:22)
Preview thumbnail for video'Lost in fog, a plane crashes upside down
Lost in fog, a plane crashes upside down (4:04)