Marcellus drilling boom may have led to too many hotel rooms

Drilling in Pennsylvania's Marcellus Shale region led to a rapid increase in both the number of hotels and hotel industry jobs, but Penn State researchers report that the faltering occupancy rate may signal that there are ...

Twin of NASA's Perseverance Mars rover begins terrain tests

On a recent day in November, the car-size rover rolled slowly forward, then stopped, perched on the threshold of a Martian landscape. But this rover, named OPTIMISM, wasn't on the Red Planet. And the landscape was a boulder-strewn ...

Finding faults: evidence of past earthquakes

(Phys.org)—Delaware Geological Survey (DGS) scientists have uncovered hard proof of faults in northern Delaware, indicating the occurrence of earthquakes millions of years ago.

Attempt at 'top kill' method to clog oil leak delayed

A make-or-break attempt to clog a ruptured pipe gushing oil into the Gulf of Mexico with a method dubbed the "top kill" has been delayed until at least Tuesday, officials said Friday.

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