Here's What'll Happen When Plate Tectonics Grinds to a Halt A new study says we may only have another 1.45 billion years to enjoy the dynamic action of Earth’s geologic engine.

The most step-rich city in the country, Pittsburgh boasts impressive scenery from its outdoor staircases, originally built for early 20th century steelworkers.

Hot and hazy weather. A Heat Advisory will be in effect through 10 p.m. Wednesday. Elevated fire danger through Wednesday. Much cooler this weekend.