More than 125 million Americans were under the highest level of extreme heat alerts during a wave of above-average ...

High temperatures in the 90s to 100s will break numerous records over the next several days, the National Weather Service said.

An increase in seismicity—marked by frequent tremors—was observed recently at Alaska's Iliamna Volcano, which last erupted in ...

The Fordow nuclear facility, buried beneath a mountain near Qom, Iran, has drawn global military attention—but it is far from ...

What time is liftoff? ULA's Atlas V should be visible outside of Florida pending weather. Did your city, state make the rocket launch visibility map?