During a dive off Argentina, scientists documented a rare jellyfish discovered a little over a century ago and seldom seen since, as well as the fish that keep it company.

Scientist off the coast of Argentina are reeling after a rare giant jellyfish sighting. The underwater footage offers a ...

Woodland Park Zoo will feature two giant tortoises for its "Wild Encounters" exhibit, and visitors will soon be able to touch ...

Giant 550 pound kangaroos could still hop scientists prove by studying fossil bones and calculating forces on ancient tendons ...

Something unusual keeps turning up in marine sediments. These are large crystals of magnetite, formed by biology rather than geology, and preserved fo.

Giant african snails are spreading into new areas, and their invasion is raising serious public health concerns. These snails ...

You forget you’re watching an animal.

Rare footage captures the giant phantom jellyfish off the coast of Argentina, one of the least-seen deep-sea creatures, ...

While the Zoo was closed, staff members captured some rare scenes of the animals experiencing the falling snow.

Giant kangaroos that lived during the Ice Age may not have been as slow and grounded as once believed. A new study finds ...

Animal names often sound precise, but many are the result of early guesswork that never got corrected. Explorers, naturalists ...

Previous research indicated that kangaroos weighing more than about 350 pounds would rupture their ankle tendons if they tried to hop. The largest of the Ice Age kangaroos, Procoptodon goliah, which ...