When sonar first picked up a massive, stair‑like object on the floor of the Baltic Sea, the image looked less like geology and more like a movie prop. The structure’s circular outline, sharp edges and ...

Off the coast of Chile there’s an island filled with mysterious monolithic structures that hold secret powers. See more in this clip from Season 21, Episode 2, "The Top Ten Mysterious Monoliths." ...

New images of 3I/Atlas, captured by Satoru Murata, went viral, sparking speculation about alien structures. A viral image taken by an amateur astronomer has triggered uproar online after viewers ...

Self-described UFO researcher Scott C Waring identified the enormous rectangular-shaped anomaly, suggesting it is approximately 10 miles long and four miles wide. Waring said he discovered the ...