Who's up for a radioactive selfie?

And what does it mean that Iran has enriched uranium past the 4.5% level?

Workers are still cleaning up after the 2011 Fukushima Daiichi nuclear power plant partial meltdown. There's a lot of contaminated material to contend with.

Iran's nuclear program is in the news, again. But what's the backstory on how the country went nuclear in the first place?

When it comes to nuclear power, one word in particular instills fear: meltdown. But what is a meltdown? Can one be avoided?

For decades physicists have pursued a long-shot approach to clean power—nuclear fusion.

For 30 years we have assumed that no life would return to Chernobyl after the nuclear disaster there. We may be wrong.