Fluvial mapping of Mars

It took fifteen years of imaging and nearly three years of stitching the pieces together to create the largest image ever made, the 8-trillion-pixel mosaic of Mars' surface. Now, the first study to utilize the image in its ...

Earth Day alert to save our frogs

With climate action a theme of Earth Day 2020 (22 April 2020), a new research paper highlights the plight of some of the most at-risk amphibian species—and shortfalls in most conservation efforts.

Large boulders help shape huge canyons, researchers find

Anyone who enjoys whitewater rafting in places like the Colorado River owes a debt of gratitude to the enormous boulders that create the foaming undulation known as rapids, and new research appears to shed more light on how ...

Study shows how river channels adjust to large sediment supplies

The seemingly simple question of what governs the shapes of river channels has been a longstanding challenge for geologists and civil engineers. A new study led by scientists at UC Santa Cruz shows that the amount of sediment ...

Image: Frozen Lake Sharpe, South Dakota

The Missouri River rises in the Rocky Mountains of western Montana, and flows generally to the southeast for 3,767 kilometers (2,341 miles) to its confluence with the Mississippi River north of St. Louis, Missouri. It is ...

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