Squid’s Deep-Sea Refuge: How They Endured Earth’s Greatest Extinction
Researchers have uncovered the evolutionary story of squid and cuttlefish, revealing their origins in the deep ocean more than 100 million years ago. These decapodiform cephalopods weathered the Cretaceous-Paleogene mass extinction event 66 million years ago by retreating to oxygen-rich deep-sea pockets. As ecosystems rebounded, they rapidly diversified into shallow coastal waters, claiming dominance in ...












