There's an organism that changed the world. It caused the first mass extinction in Earth's history and also paved the way for complex life. How? Anusuya Willis explains how cyanobacteria, simple organisms that don't even have nuclei or...

Here at SciShow we love digging into the subject of dinosaurs! Join Blake de Pastino, co-host and co-creator of the new series PBS Eons, as he takes you into the deep past for a few of our favorite dinosaur episodes!

Communicating underwater is challenging. Light and odors don't travel well, but sound moves about four times faster in water than in air - which means marine mammals often use sounds to communicate. The most famous of these underwater...

Five years ago, Roz Savage quit her high-powered London job to become an ocean rower. She's crossed the Atlantic solo, and just started the third leg of a Pacific solo row, the first for a woman. Why does she do it? Hear her reasons,...

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!

Victor Vescovo is leading the first-ever manned expedition to the deepest point of each of the world's five oceans. In conversation with TED science curator David Biello, Vescovo discusses the technology that's powering the explorations...

Some fish will never win any beauty pageants, but they still deserve our admiration, respect, and love, especially since their “ugly” traits are actually incredible examples of evolutionary innovation.

Scientists have been searching for the hard-to-find nests of Storm Petrels in order to protect them, but first, they'll have to follow their nose.

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

2022 is looking like a great year for space exploration! Let's dig into three of the missions that we're really excited to watch unfold!

In the pitch-black night, stung by jellyfish, choking on salt water, singing to herself, hallucinating … Diana Nyad just kept on swimming. And that's how she finally achieved her lifetime goal as an athlete: an extreme 100-mile swim from...

There are tens of thousands of types of worms on our planet, and these wiggly wonders are oh-so fascinating that we had to put together different stories about them to reveal just how 'wormdeful' they are.

Hank introduces us to another amazing organism - the "immortal jellyfish," Turritopsis dohrnii - and explains how it can extend its life cycle indefinitely through a process known as transdifferentiation.

NASA has announced the scientific instruments for the Europa Clipper mission, and Cassini has passed Hyperion, the so-called “spongy moon,” for the last time.

They're slippery. They're slithery. And while they totally look like underwater snakes, eels are, in fact, unique fish that can breathe through their skin and even survive out of water. James Prosek tracks the life journey of Eli the...

Fish consider the ocean their own personal toilet. Well, researchers found out that's not such a bad thing!

Some are longer than a blue whale. Others are barely larger than a grain of sand. One species unleashes one of the most deadly venoms on earth; another holds a secret that's behind some of the greatest breakthroughs in biology. They've...

SciShow Space celebrates the Falcon 9 vertical landing and looks forward to new missions in space! Also-- are globular clusters a good place to look for extraterrestrial life? Find out in this episode of SciShow Space News!

Despite their iridescent colors and smooth shapes, pearls are actually made of the exact same material as the craggy shell that surrounds them. Pearls, urchin spines, the shells of mussels, snails and clams, even coral— all these...

Hank talks about a few - maybe crazy, maybe reasonable - geoengineering schemes that some scientists have come up with in order to "fix" climate change, including designer clouds, ocean fertilization, and stratospheric shading with...

Artist Dianna Cohen shares some tough truths about plastic pollution in the ocean and in our lives -- and some thoughts on how to free ourselves from the plastic gyre.

Humans can’t go too far above or below sea level unaided, but there are some complex forms of life that CAN survive at super high elevations or in the deepest parts of the ocean.

Sounds in the ocean can travel more than 10,000 miles - that's halfway around the world! Here's how.

Sunken relics, ghostly shipwrecks, and lost cities aren't just wonders found in fictional adventures. Beneath the ocean's surface, there are ruins where people once roamed and shipwrecks loaded with artifacts from another time. Peter...