Scientists have detected a strange new type of high-frequency wave on the sun's surface, and the waves are moving three times faster than scientists thought was possible. The acoustic waves, called high-frequency retrograde (HFR) vorticity waves, were spotted rippling backward through the sun's plasma in the opposite direction of its rotation. The previously unknown type of wave was described in a study published March 24 in the journal Nature Astronomy. Scientists can't see into the sun's fiery depths, so they often measure the acoustic waves that move across its surface and bounce back toward its core to infer what's going...