The EPA recommends taking action if your home or building is found to have a radon level higher than 4.0 pCi/L. Over time, ...

In an extraordinary leap forward for astrophysics, astronomers have achieved a momentous breakthrough with the first direct ...

Hurtling to Earth at some 45,000 miles an hour, the impact likely sent out a flash of energy that ignited landscapes within a 900 miles radius. “Mexico was on fire immediately,” Anderson says.