Antarctic Detector ⁢Finds Bizarre Signals, Defying Physics

‍⁢ Updated June 19, 2025

an international team, including Penn State scientists, reports that a cosmic particle detector in Antarctica has registered a series of strange signals. These signals challenge established models of ⁢particle ⁤physics. The Antarctic Impulsive Transient ⁣Antenna (ANITA) experiment, wich uses ⁢instruments on high-altitude balloons, detected ‍the unusual radio pulses. ANITA is designed to detect radio waves emitted when cosmic rays strike the atmosphere.

The‍ experiment seeks to ⁣understand cosmic events by analyzing signals reaching Earth. The team noted that the signals, a type of radio wave, seemed to originate from below the horizon.⁣ This is an orientation that⁢ current physics cannot explain. It may point to previously unknown particles or interactions, ⁢researchers said.

Stephanie Wissel, associate professor of physics, astronomy and astrophysics, worked on the ANITA team. She said the radio waves were detected ⁢at steep angles, approximately 30 degrees ⁢below ⁣the ice surface. Wissel added that‍ calculations suggest the anomalous signal would have⁣ had to pass through thousands of kilometers of rock.This interaction should have rendered the radio signal undetectable due to absorption.

“It’s an fascinating problem because we still don’t actually have‍ an clarification for what those anomalies ‍are, but what we do know ⁣is that they’re⁢ most likely not representing neutrinos,” Wissel said.

Neutrinos ⁢are abundant, chargeless ⁤particles with ⁣minimal mass.⁢ They are typically emitted by high-energy sources, such as the sun, supernovas, or even the Big Bang. Wissel explained ⁢that neutrinos are notoriously tough to detect.

“You have a⁤ billion neutrinos passing through your thumbnail at any moment, but⁤ neutrinos⁣ don’t really interact,” she said. “So, ⁣this is‍ the double-edged sword problem. if we detect them, it means they have traveled all this way ⁤without ⁤interacting with anything else. We could be detecting a⁤ neutrino⁤ coming from the edge of the observable universe.”

Detecting and tracing ⁣neutrinos could reveal more about⁣ cosmic events than powerful telescopes, Wissel said. these particles ‍travel undisturbed, nearly at the speed of light, providing clues about events light-years away.

Wissel and ‍other researchers are designing detectors to ⁣capture even small neutrino⁣ signals.She emphasized that even a single neutrino signal contains valuable details.

“We use radio detectors to try to build really, really large neutrino telescopes so that we can go after a pretty low expected event rate,” said Wissel.

ANITA is positioned in⁤ Antarctica to minimize signal interference. The balloon-borne detector flies over ice stretches to capture emission signals, known as ice showers.

“We have these radio antennas on a balloon ⁤that ‍flies 40 kilometers above the ice in Antarctica,” Wissel said. “We point our antennas down at the ice and look for neutrinos that interact in the ice, producing ⁢radio emissions that⁤ we can then sense on our detectors.”

Tau neutrinos, interacting with ice, produce tau leptons. ⁤These secondary particles decay,releasing ⁤energy and breaking down into ⁣constituents,creating air showers.

Wissel said that⁤ air showers,⁢ if ‍visible, would resemble a sparkler with trailing sparks. Researchers differentiate between ice and air showers to determine particle attributes.

The signals are traced back to their origin, ‍similar to ⁣a ball bouncing predictably.However, the recent findings cannot‍ be traced back in this manner, as the angle is sharper than predicted.

Researchers analyzed data‍ from multiple ANITA flights, ⁢comparing it with models and simulations. This helped filter noise and eliminate known particle-based signals.

They cross-referenced signals with data from the ⁢IceCube experiment and⁢ the Pierre Auger Observatory.The other detectors ⁢did