TED-Ed
TED-Ed: How breathing works - Nirvair Kaur
We breathe constantly, but have you ever thought about how breathing works? Discover the ins and outs of one of our most basic living functions-- from the science of respiration to how to control your breaths.
Bozeman Science
AP Biology Lab 2: Enzyme Catalysis
Paul Andersen starts with a brief description of enzymes and substrates. He then explains how you can measure the rate of an enzyme mediated reaction. Catalase from yeast is used to break hydrogen peroxide down into water and oxygen. ...
SciShow
The Two-Faced Role of Planetary Magnetic Fields
Given that Earth’s magnetic field helps protect its life-sustaining atmosphere, you might think that the stronger a planet’s magnetic field, the better. But as it turns out, some planets’ relationships with their magnetic fields are a...
SciShow
Why Don't Marine Animals Get "The Bends"?
"The bends" is one of the biggest risks that humans have to deal with when diving, but why don't marine animals, which are diving all the time, get them?
SciShow
What's at the Bottom of the Deepest Lake in the World
Besides being the deepest lake on Earth, Lake Baikal supports a bizarre collection of species that are found nowhere else!
Bozeman Science
Homeostasis Hugs
Paul Andersen explains how hugs between tissues can help maintain homeostasis. Countercurrent heat exchange allows heat to stay within the core of the body. Close contacts between the capillaries and alveoli allow our body to maintain...
Crash Course
Redox Reactions: Crash Course Chemistry
All the magic that we know is in the transfer of electrons. Reduction (gaining electrons) and oxidation (the loss of electrons) combine to form Redox chemistry, which contains the majority of chemical reactions. As electrons jump from...
SciShow
5 Technologies Helping Us Explore The Deep Ocean
The ocean is the largest ecosystem on Earth, but it's still mostly unexplored. This is partially due to the challenges of ocean exploration, like bone-crushing pressure and the need to bring your own air. But here are five ways that...
SciShow
The Bacteria That Make Perfect, Tiny Magnets
Learn how magnetic bacteria work, and how scientists think they can help technology in the future!
SciShow
These 100-Million-Year-Old Microbes Are Still Alive!
Researchers have found ancient communities of microbes that have been buried deep, for a hundred million years! This discovery might be the oldest living thing on Earth, and could even expand the search for life on other planets.
SciShow
Why Crocodiles Have an Extra Hole in their Heart
Crocodiles have four-chambered hearts, just like we do! But, while our hearts do just fine with four valves, they have a slightly different approach…
SciShow
Why You Can't Bake a Mason Jar
Regular old glass like the kind that makes up a mason jar can shatter and explode if put in the oven. But we do have types of glass that you can bake your pie or brownies in and it's all thanks to some neat chemical tricks.
SciShow
Nitroglycerin: Explosive Heart Medication
Imagine a substance so powerful that it could blow you to bits or save your life depending on how you used it. Well imagine no more: such a substance exists and you've probably heard of it.
Crash Course
Blood Vessels, part 2: Crash Course A&P
And now we return to blood vessels. In this episode, we start discussing what blood pressure is, how it can become "high", and what that means for our health. One of the more interesting points is that your body has ways of dealing with...
SciShow Kids
Why Is Fire Hot?
Whether you're out camping, cooking, or snuggled up in front of your fireplace, you know that fire is hot! But why? Join Jessi and Squeaks to learn how fires turn wood or other fuel into useful heat!
SciShow
3 Chemistry Experiments That Changed the World
Chemistry is the study of matter - stuff, and how it interacts with other stuff. Even though chemistry doesn't make a lot of news these days, chemists are making discoveries that change lives all the time. If Hank had to narrow down all...
SciShow
The 17+ Different Kinds of Ice!
Ice is ice, right? Wrong! From the vacuum of deep space to the inside of ice giant planets, ice gets stretched and squished into way more forms than what we find here on Earth.
SciShow
How Living on Mars Would Make Life Better on Earth
If we ever want to live, sleep, eat, and breathe on Mars, we are going to need some the best tech humans can dream up - and as a bonus that tech might actually help tackle challenges right here on Earth!
SciShow
How Do Marine Mammals Hold Their Breath For So Long?
How is it possible for air-breathing marine mammals like sperm whales and elephant seals to hold their breath for so long?
Be Smart
Carbon and Oxygen and You: Explained
A little bit of explanation for the cycle of carbon and oxygen
Amoeba Sisters
DNA Replication (Updated)
Explore the steps of DNA replication, the enzymes involved, and the difference between the leading and lagging strand! This video is an update from our old DNA replication video with nearly the same script but added detail and improved...
Bozeman Science
Chemical Change
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 in...
TED-Ed
TED-Ed: How polarity makes water behave strangely - Christina Kleinberg
Water is both essential and unique. Many of its particular qualities stem from the fact that it consists of two hydrogen atoms and one oxygen, therefore creating an unequal sharing of electrons. From fish in frozen lakes to ice floating...
Be Smart
The Cosmic Origins of Earth's Water
Why is Earth is a blue planet? Because it's covered in water! Where did Earth's water come from? Of course, water isn't unique to our planet. The origin of water traces beyond the solar system to the earliest days of the universe. Here's...