PhysicsAxions may or may not exist - but we're not just making things upEverything theoretical physicists do is speculative, and likely wrong, except for the things we get right, says Chanda Prescod-WeinsteinComment
PhysicsHot rubble from volcanoes races over land on a carpet of air bubbles Clouds of rocks and gas known as pyroclastic flows spew out of volcanoes and race over land at terrifying speeds, skating on an air pocket beneath the rubble News