Russia’s Oscar II-class (Project 949A Antey) nuclear-powered submarines, originally designed as Cold War “carrier killers,” ...

The surface of the Earth is about two-thirds water, but how much of the world’s deep seas do you think we’ve explored?

Depth use was influenced by temperature, but differently by sex: Females dived to greater depths than males in SST between 26°C–28°C, possibly to avoid warmer surface waters. Deep diving in males was ...