Opinion: We have lost an irreplaceable leader in David Mattson, but not his lifetime of work. His model for detail and determination are an inspiration.

The Rocky Mountain region, which includes Colorado, Idaho, Montana, New Mexico, Utah, and Wyoming, accounted for about 43% of ...

A new assessment says there's about 27 trillion cubic feet of natural gas — close to what the U.S. consumes in a year — and ...

Does it sometimes seem like every single inch of Earth has been discovered? Far from it. But scientists are working on it.