Ghostly subatomic particles help scientists peer inside the guts of dangerous volcanoes

An aerial view of the Sakurajima Volcano in Japan's Kagoshima Bay.Jun Asano/Getty
Subatomic particles called muons are born from cosmic rays bombarding the atmosphere.
Because muons can penetrate objects, scientists are using them to peek inside volcanoes.
This technique — called muography — may help experts predict volcanic eruptions, research suggests.
Muons are everywhere. Unbeknownst to you, several hundred strike your head every second. These subatomic particles — created