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Letter from the editor

Mars Atmospheric Entry, Descent, and Landing: An Atmospheric Perspective

"Beginning in the very earliest years of the space age, a flotilla of robotic explorers have been sent to study Mars—first simply to fly by, then to orbit, and, later, to attempt landing on the surface..." – By Michael Mischna



"Tektites are a rare type of impact glass; they are found in only four distinct and geographically extended strewn fields, ranging from 0.8 to 35 million years in age. For three of these four strewn fields, the source crater..." – By Christian Koeberl

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