While the evolution of the butthole was a major breakthrough in animal development, its story might actually end with redefining what it means to have a butthole at all.

Jellyfish aren't the most nutritious animals in the ocean. Yet sea turtles and many other organisms get their nutrition from almost nothing else. Here's why they don't totally starve to death.

When you think of a jellyfish, do you imagine an angelic stingy blob? That's just one stage of the life of a jelly!

This weird-looking creature has been mistaken for a lot of things, including a whale placenta and a sea monster as well as a garbage bag. And less often, it’s recognized for what it is: a jellyfish!

Did you know that the bottom of the ocean is home to some of the strangest creatures on Earth? Join Michael Aranda for a fascinating dive into the murky depths—you won't believe what's down there.

You probably know that Australia is famous for giant snakes and spooky spiders... but oh... there's SO much more. Join Hank Green as he shows you seven truly terrifying Australian inhabitants that you might not have heard of—and some are...

There are some weird animals out there, but few environments have produced stranger creatures than the deep ocean!

As far-fetched and futuristic as it might sound, researchers are working on turning jellyfish into ocean-exploring robots.

We’ve already been told that everybody poops - but did you ever stop to consider why? It’s thanks to our heroic through-gut that humans don’t suffer the same fate as jellyfish and anemones, and every hero has an origin story…

Hank tells us of a fascinating new experiment in synthetic biology - scientists have created a jellyfish out of silicone and rat heart cells.

You're swimming in the ocean when something brushes your leg. When the tingling sets in, you realize you've been stung by a jellyfish. How do these beautiful gelatinous creatures pack such a painful punch? Neosha S Kashef details the...

If you've spent any time on the internet, you know that Australia is host to all sorts of horrible spiders and snakes. But that doesn't even begin to cover the myriad of dangerous, sometimes deadly, plants and animals you...

If you trace your way back along the tree of life, eventually you'd come face-to-face with the very first animal. But what exactly would that animal have looked like?

This weird-looking creature has been mistaken for a lot of things, including a whale placenta and a sea monster as well as a garbage bag. And less often, it’s recognized for what it is: a jellyfish!

Joe Hanson went behind the scenes at the Monterey Bay Aquarium to learn about jellyfish.

This jellyfish might look kind of unassuming, but it's got some surprising long-range weaponry to catch its prey!

You might think venomous snakes or fierce lions are the best hunters, but turns out they are not even close to these 6 actual best hunters in the animal kingdom.

Although gelatinous animals might seem like simple creatures, they'll probably outlast the rest of us, because being gelatinous might turn out to be the ultimate survival strategy.

We know more about some other planets than we do about the deepest corners of Earth's oceans, and the species we've found there are almost alien. Here's some of the most unbelievable oddities ever observed! Special thanks to the Monterey...

Hank introduces us to the "simplest" of the animals, complexity-wise: beginning with sponges (whose very inclusion in the list as "animals" has been called into question because they are so simple) and finishing with the most complex...

Watch Out For Jellyfish Attacks In Australia!

This marine marvel captivates visitors every year at New Orleans' Audubon Aquarium.

This marine marvel captivates visitors every year at New Orleans' Audubon Aquarium.

They're spineless - brainless - and absolutely mesmerizing to watch.