Overview

• ANITA detected radio pulses emerging from beneath the ice at steep, below-horizon angles that current particle physics cannot account for.
• The signals seem to have passed through thousands of kilometers of rock and ice, ruling out their origin as neutrino interactions.
• Independent arrays at the IceCube Experiment and the Pierre Auger Observatory registered no matching events, confirming the anomaly remains unexplained.
• Researchers propose the pulses could signal unknown particle interactions, novel physics or effects related to dark matter.
• The PUEO mission will carry upgraded antennas to Antarctica later this year to improve sensitivity and investigate the anomalous radio emissions.