A massive iceberg that broke away from Antarctica exposed something that left scientists baffled.
Over 1,000 mysterious "dimples" were found carved into the sea floor, Discover Wildlife reported.
While this discovery may sound like a curious deep-ocean surprise, researchers warned that it highlights how vulnerable polar ecosystems are as changing conditions open access to these once-frozen habitats.
The Weddell Sea Expedition team originally set out to search for explorer Sir Ernest Shackleton's lost ship, the Endurance. Instead, they found icefish nests previously hidden beneath the ice sh