The last sighting of the glass octopus was in 2021, and scientists still don't know much about this highly elusive species.

Phoebe Waller-Bridge narrates a new Amazon Prime Video two-part documentary special called "Octopus!", which explores the quirks of octopuses and premieres on May 8 ...

Cheetahs may be classified as big cats, but they are completely different from lions, tigers, and leopards. Built for speed rather than strength, cheetahs have unique adaptations that set them apart ...