It's all about their chemistry.
Here's how that steam-powered boom could happen.
At the bottom of the sea, Colin Devey studies how our continents move away (and toward) each other.
After 54 years, a Bali Volcano erupts.
The rocks know
Axial Seamount could help us answer basic questions about how volcanoes work
Did an eruption turn Icelandic vikings into Christians?
We know where, but we donâ€™t know when. Satellite monitoring provides valuable clues
Earlier this week, lava flows put the volcanic Italian island of Stromboli on high alert. Here, we show you how scientists are using tech to better forecast when volcanoes worldwide are likely to blow
And what they can tell us about the mysterious southern continent.
An ambitious experiment is underway to harness the heat of a volcano in central Oregon. The process is green, efficient... and causes earthquakes.
Installing sensors in Nicaragua's Masaya volcano
Evacuations and ash plumes and lava, oh my!
Put some fire and ice into your day.
Journey (not quite) to the center of the Earth
The sounds of science.
In Iceland, a question of ice and fire
At least, some of them did...
We've rounded up 2014's most mind-blowing images for your viewing pleasure