Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. An unknown volcano ...

Languages: English. Iceland's second-largest volcano may be about to wake up after a near-decade-long slumber following a "swarm" of seismic activity this week. Approximately 130 earthquakes were ...

Tremors as strong as magnitude five have raised concerns the volcano that forms Santorini's steep, picturesque cliffs, could erupt. The risk is high enough that Greek authorities convened an ...