How Do Fish Breathe? | Animal Science for Kids

Squeaks and I are adopting a pet goldfish! He lives in a fish tank, and he’s a great swimmer! In fact, this little guy’s whole body is really suited to life in the water. He has great fins to help him swim, and eyes that can stay open in the water. These special body parts […]

Why Megalodon (Definitely) Went Extinct

About 8 million years ago, a little baleen whale was swimming in the warm coastal waters of Peru. It was only about 3 or 4 meters long, about the size of a Beluga whale, and while it filtered mouthfuls of plankton-rich water, it was unaware that just below it swam a predator. Like the great […]

These Fish Eat Scales

[♪ INTRO] You’re probably pretty familiar with the Hollywood image of piranhas. The water starts churning, and suddenly an unlucky animal is nothing but a bare skeleton. And yeah, piranhas can definitely do some damage, but most of them aren’t these ferocious monsters. They eat lots of different things, and many piranhas — along with […]

The Mystery of the Barreleye Fish

Just off the west coast of the United States, deep down in the Pacific Ocean, there lives a fish. And not just any fish. With its long, bulging eyes and transparent head, the Pacific barreleye fish is a little… different. Biologists don’t actually know much about it, because like many deep-sea animals, the barreleye is […]

When Fish First Breathed Air

385 million years ago, the land was all but empty. The continents were home to only some sparse plants and fungi, and a few pioneering arthropods. Life in the oceans, however, was booming. The waters teemed with squid, bony fish, and sea scorpions. But there was one group of fish that was about to go […]

Why Most Sand Tiger Sharks Die in the Womb

As humans, we tend to think of the womb as a nice, warm, safe place. But if you were a sand tiger shark, the womb might seem like the most dangerous place on the planet. I’m Anna Rothschild, and this is Gross Science. Sand tiger sharks are large sharks that live in warm and temperate […]

Modern Human Migration and Echolocating Eels

There’s something that’s been puzzling scientists for a while. We knew that modern humans originally came from Africa about 200,000 years ago, but… we didn’t really know when we left. According a paper published this week in Nature, teeth found in Fuyan Cave in the Hunan Province of China puts prehistoric modern humans, or homo […]

7 of the Most Uniquely Fierce Sharks

[ ♪ Intro ] Sharks come in a lot of different shapes and sizes, and not just big, bigger, and “God, help save me!” Worldwide, there are at least 500 different shark species, and most of them aren’t the bazillion-toothed, seal and surfer-terrorizing nemeses of the deep that Hollywood tells us they are. The great […]

When Sharks Swam the Great Plains

If you’ve ever been to, or lived in, or even flown over the central swath of North America, then you’ve seen the remnant of what was a uniquely fascinating environment. It’s all prairies and cities now, but long ago, it was rife with exotic, aquatic life. It was full of ammonites, colossal clams, and toothy […]