Jupiter's violent moon Io has been the solar system's most volcanic body for around 4.5 billion years

A view of Io captured by the Galileo spacecraft.

The solar system's most volcanic body, the moon of Jupiter Io, has been in turmoil for at least 4.57 billion years, right back to its birth and the infancy of the sun.

Those are the findings of a team of scientists who examined Io with the Atacama Large Millimeter/submillimeter Array (ALMA) to track sulfur and chlorine in the Jovian moon's atmosphere.