The story grew sharper through analysis of the stream-length (SL) gradient index, which flags knickpoints—sudden drops or ...

A conservation plan will help preserve 6,000 acres of land in northern New Mexico, a region that frequently appears in the ...

In the Alaskan Arctic, a quiet revolution in permafrost science is rewriting what we thought we knew about frozen ground and ...

Farms and cities use so much of the Colorado River's water that little remains for the river's own ecosystem. Will ...

Ancient Mars is coming into sharper focus as a planet laced with rivers, deltas and vast drainage basins, and that new map of ...

For the first time, scientists have mapped vast, continent-scale river drainage systems on Mars — ancient networks that may ...