While the Earth as Art series is mesmerizing and the Image of the Week is fascinating (and maybe a little frightening), Montanans might be most interested to see what Lewis and Clark's expedition looked like from outer space.
The gallery includes 21 images of key locations from throughout the journey. For example, there's Camp Fortunate in Montana, pictured here, where Sacagawea recognized the leader of the Shoshone as her brother, and, after some negotiation, the tribe ended up agreeing to help the expedition cross the Continental Divide.
Each of the images features a description of the site's significance, which is helpful. But really, this is all about the beauty of satellite images, and how they put the landscape into perspective.