You wouldn't expect humans to have missed a whole species of giant octopus - but researchers recently revealed that's exactly what we did. Per Earther, the giant Pacific octopus (GPO), which is the biggest octopus we know...
Cephalopods are the undisputed masters of camouflage. While their relatives, the clams, stayed brainless and safe on the seabeds-of-old, the ancient nautilus (think squid-in-a-shell) made a daring foray into the world of...