Add Yahoo as a preferred source to see more of our stories on Google. Here's what you'll learn when you read this story: On April 26, 1986, disaster struck the small Ukrainian-Belarusian border town of Chernobyl, (then part of the Soviet Union) when a series of steam explosions led to a nuclear meltdown.

The Department of Health and Human Services (HHS) is launching a study on whether radiation from cellphones could harm Americans' health.

The Department of Health and Human Services (HHS) is launching a study on whether radiation from cellphones could harm Americans' health.