Antarctic expedition to find Endurance shipwreck made surprising seafloor discovery

By Ashley Strickland, CNN (CNN) — During an expedition to search for a famed shipwreck, researchers discovered something unexpected: striking geometric patterns on the floor of Antarctica’s western Weddell Sea created by fish. The seafloor had once been obscured beneath a thick ice shelf, but that changed in July 2017 when the massive A68 iceberg