In this video Paul Andersen explains how chemical differs from physical change. In the laboratory macroscopic observations are used to infer changes at the particulate level. Evidence for chemical change include gas production, change...

Humans are creatures of rhythm and repetition. From our breath to our gait: rhythm is central to our experience, and often brings us pleasure. We can find pleasure in the rhythm of a song, or even the rows of an orchard. Of course, too...

Kids are weird. They eat mud, talk to bugs, and stick things up their noses... but the changes kids go through as they grown out of infancy and into childhood are even weirder!

Soaking in a hot tub is a great way to relax your tired body, but it also comes with some microbial risks.

Knock knock! Who’s there? It’s Jessi and Squeaks exploring the science of why we laugh!

Ever notice how one side of your nose always seems to be more stuffed than the other? What's up with that? Quick Questions knows!

Dolphins aren't just smiley and cute! Jessi gives you 5 reasons why dolphins are awesome in this episode of SciShow Kids.

Hiccups can be really annoying and hard to get rid of, but do you know why they happen? Find out the answer and learn more about how your lungs work at the same time on today's SciShow Kids!

High elevations can be a problem for humans. Since the air is thinner, you get less oxygen with every breath, leading to all kinds of negative side effects. But there are millions of people around the world who spend their whole lives at...

Have you experienced embarrassing voice cracking? Most people have, and there’s a lot of reasons why you might be affected. From illness, stress, and good old puberty.

Photosynthesis is an essential part of the exchange between humans and plants. Amanda Ooten walks us through the process of photosynthesis, also discussing the relationship between photosynthesis and carbohydrates, starch, and fiber --...

Humans’ experiences with ventilators have taught us that sighing isn’t just a way to express yourself: it’s a vital part of our everyday breathing.

If you want to be able to breathe underwater, you're going to need to get creative. So some turtles, dragonfly nymphs, and sea cucumbers decided to use their butts.

Whether it's from a box or a bottle, letting your wine 'breathe' can actually make a difference in its taste.

Jessi and Squeaks love pretending to be space explorers, visiting far-away planets! Did you know that, right now, there are scientists working on ways to send people to other planets in real life? And where better to start than our...

This week, Hank elaborates on why Fugu can kill you by illustrating the ideas of solutions and discussing molarity, molality, and mass percent. Also, why polar solvents dissolve polar solutes, and nonpolar solvents dissolve...

What is matter, anyway? What does it have to do with math? And why aren't you made of Jesus? Delving deeper into the theory of (almost) everything - the Standard Model of particle physics.

It seemed like a miracle stone, and eventually, the ancient Greeks, Romans, and Egyptians all started using it, too.

Jessi and Squeaks adopted a new fish! They have him all set up in a nice fish tank, but now they have a big question: how do fish breathe underwater?!

Every time you breathe, air travels down the trachea, through a series of channels, and then reaches little clusters of air sacs in the lungs. These tiny sacs facilitate a crucial exchange: allowing oxygen from the air we breathe into...

Get to know your body’s most important muscle -- your heart -- and learn how to take your own pulse!

What's the antidote to rising nationalism, polarization and hate? In this inspiring, poetic talk, Valarie Kaur asks us to reclaim love as a revolutionary act. As she journeys from the birthing room to tragic sites of bloodshed, Kaur...

Paul Andersen shows how homeostasis reflects of evolution through time. The endocrine system shows continuity through flatworms, earthworms and vertebrates. However the respiratory system shows change as organisms move onto land. The...

This video identifies the needs of living things such as air, water, food, and habitat.