The Shoemaker impact site in Australia may have been formed as long as 1.63 billion years ago.
Image of the Day Land
Astronauts capture the first confirmed image of the structure taken from the International Space Station.
This geologic feature has captured the attention of astronauts for about as long as NASA has sent humans into orbit around Earth.
Unique Imagery
Many of the salt lakes in Western Australia are found along the valleys of ancient river systems that no longer flow.
Image of the Day Remote Sensing
Acquired February 18, 2010, this true-color image shows Lake Acraman and surrounding saltpans in South Australia. The sprawling saltpans appear off-white, and the largely bare soils appear in shades of orange and brown.
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