By Samuel Lopez | USA Herald WASHINGTON, DC — Among the many intriguing traits of 3I/ATLAS, one of the least-reported but scientifically significant findings is its unique polarimetric behavior—observations that may hint at surface or structural properties unlike those of typical solar system comets. Here’s what the data tell us: Astronomers obtained polarimetric measurements of New polarimetric data on 3I/ATLAS show unusual negative-polarization behavior—suggesting surface properties unlike typical comets and hinting at fresh insights into interstellar visitors.