In March, the internet fell in love with a newly discovered species of octopus that was quickly dubbed "casper." Named after the 1995 animated film, "Casper the Friendly Ghost," the ghost-like octopus ...

Imagine four skyscrapers the height of Burj Khalifa, the world's tallest building, stacked on top of one another. That's almost the height of an underwater mountain newly discovered and mapped by ...

An underwater research craft has spotted a "ghostlike" octopus that appears to belong to a previously unknown species at a depth of more than two miles (3 km) on the floor of the Pacific Ocean near ...