NASA’s ANITA Experiment Picked Up Strange Signals Beneath Antarctic Ice That Traveled Through Thousands of Kilometers of Rock
The Daily Galaxy • • science
Key Points:
- Since 2016-2018, NASA’s ANITA experiment has detected unusual radio pulses appearing to come from beneath Antarctic ice, challenging existing physical models of particle interactions.
- These signals arrive at steep angles that would require them to travel through kilometers of rock, a journey expected to absorb such signals, making their detection puzzling.
- Comparative analysis with data from the Pierre Auger Observatory and IceCube experiment found no similar events, suggesting the ANITA signals are anomalous and unlikely to indicate new physics.
- Initial hypotheses attributing the signals to neutrinos have been largely discounted, as neutrinos would likely be absorbed before producing detectable interactions after passing through Earth.
- Scientists now speculate the anomaly may result from unknown radio wave propagation effects near the ice surface and horizon, though no definitive explanation has yet been identified.
