The closer a volcano is to erupting, the greener the trees around it look from space

A volcano with lava running down its side. The volcano is surrounded by lush forest.

Scientists can tell whether a volcano is about to erupt from the greenness of the trees around it, with more vibrant leaves indicating a potentially imminent blast.

Until now, these subtle color changes could be observed only from the ground — but researchers have recently found a way to monitor them from space.