The nitrogen cycle is essential to life on Earth, but biological nitrogen must be fixed before it can be used. Scientists aren't sure how the first nitrogen became available... but it might have been volcanoes.

Explore 11 human body systems with the Amoeba Sisters in this updated video (2024). This video focuses on general functions for the following systems (and also provides a few structure examples): Circulatory, Digestive, Endocrine,...

The Moon is typically 380,000-ish kilometers from the Earth, so it doesn't seem like they have that much of a direct influence on one another. However, the presence of hematite on the lunar surface suggests our planet is causing the Moon...

Have you heard about this technique called mouth taping, and the claims it can cure everything from asthma to bad breath? We're here to cover what science and peer-reviewed research actually has to say about it.

There's a few minerals that exhibit something called piezoelectricity and pyroelectricity, which mean that either heat or pressure can turn them electric. Here's a demo from the SciShow Rocks Box where you can see this for yourself - all...

Elephants might be strong, but they are weak compared to ants because ants have certain advantages that allow them to outlift their larger competitors.

Have you ever found yourself getting teary-eyed on a plane, and not because of the lack of legroom? Turns out there's a few good reasons that science says that's totally normal. Don't forget to throw some tissues in your carry-on.<br/>

Squeaks and Jessi would love to visit Mars one day, but our neighboring planet is very different from Earth. Together, they make a travel plan and packing list that will help them overcome the challenges of life on Mars! Thanks to our...

Axolotls are amazing pets! Join Jessi and Squeaks as they learn about why axolotls have feathery gills and live in water, and how to protect their natural habitat.



First Grade Next Generation Science...

Recently, a group of scientists have declared that the start of the Anthropocene, the time of outsize human influence on Earth, to be Crawford Lake in Canada. But how can a time be a place? We'll explain, and maybe grab some maple...

Bacteria is enormously resourceful and will find a way to grow just about anywhere it can, and that includes space stations. Here's a compilation of how that's happened in the past and how we've handled it!<br/>

Astronomers have found more than 5,000 planets in the last three decades, but that’s not nearly as exciting as potentially coming across the first extraterrestrial creatures. And we may finally be in a position to make that discovery.

There are a lot of weird exoplanets out there, like 55 Cancri e (aka Janssen), which is probably half covered in lava. But the half that's covered in lava might not be quite the half you're thinking of.<br/>

For decades, researchers thought they had a solid idea about the earliest booms in animal life. But new research might have turned off the gas on all these ideas, flipping our understanding of the Avalon explosion and the Cambrian...

Mercury, Venus, and Mars are all super low on water – so where did ours come from and why do we have so much of it? We think our water came from a few unlikely sources: meteorites, space dust, and even the sun.

This giant millipede was the largest known invertebrate to ever live on land. So how did it get so big??

There was a time in Earth’s history that was so stable, geologists once called it the Boring Billion. But the fact is, this period was anything but boring. In fact, it set the stage for our modern version of plate tectonics - and...

Thanks to a recent adaptation, instead of getting sick from the boozy, fermented fruits, one of our primate ancestors could digest them safely, and get more calories at the same time. This new superpower would open up a whole new...

In the middle of the Cambrian, life on land was about to get a little more crowded. And those newcomers would end up changing the world. The arrival of plants on land would make the world colder, drain much of the oxygen out of the...

They have survived every catastrophe and every mass extinction event that nature has thrown at them. And by being the little, filter-feeding, water-cleaning creatures that they are, sponges may have saved the world.

We tend to think that evolution only goes in one direction— toward getting bigger and more advanced. But that’s not always the case. This tiny, simple animal, the Myxozoans, (yes, animal!) evolved from something bigger and more complex.

Blood is one of the most revolutionary features in our evolutionary history. Over hundreds of millions of years, the way in which blood does its job has changed over and over again. As a result, we animals have our familiar red blood....

If we lived light years from Earth, how would we know there’s life here? Let’s take a look at the search for extraterrestrial life on habitable exoplanets, and discover what biosignatures would show someone else that we’re here.

We’re living longer. Dying less. Human life expectancy has doubled in just a couple centuries. Machines and meals and medicines keeping us alive long past the age where we can make babies. Does this mean our species is no longer under...