SciShow
The Siberian Traps: A 250 Million Year Old Crime Scene
The event that killed the dinosaurs 66 million years ago might be the most famous mass extinction ever, but it's not the only one in Earth’s history, nor is it the worst... not by a long shot.
SciShow
Is Alkaline Water Really Better For You
A new health trend is claiming that it can rebalance your internal chemistry and help prevent cancers and bone loss, but what are the real health benefits of drinking alkaline water?
Bozeman Science
pH and Buffers
In this video Paul Andersen explains how buffer solutions maintain pH in a solution. A buffer solution is made up of a weak acid and its conjugate base. As strong acids or bases are added the pH remains stable. A good buffer solution has...
SciShow
Onions, Emotions, and Why We Cry
Have you ever wondered why we cry? In today's episode of SciShow, Hank gives us the answer, covering different types of tears and whether we are the only species to get all teary eyed during the final scene of a good movie.
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
What Does Carbonated Water Do to Your Body?
We love carbonated drinks, but they also get a bad rap. What does bubbly water do to our body? Is it really bad for us?
Crash Course
Carboxylic Acid Derivatives & Hydrolysis Reactions: Crash Course Organic Chemistry
Esters have a wide range of uses, from giving perfumes and colognes their fragrances, to preventing diseases like scurvy. Vitamin C, that scurvy preventing antioxidant, is derived from carboxylic acids, a class of organic compounds we’ve...
SciShow
Why Is My Pee Green?
How worried should you be when your urine isn't yellow, but instead it's green, red, or even black?
TED-Ed
What causes cavities? - Mel Rosenberg
When a team of archeologists recently came across some 15,000-year-old human remains, they made an interesting discovery: the teeth of those ancient humans were riddled with holes. So what causes cavities, and how can we avoid them? Mel...
TED-Ed
TED-Ed: The surprising cause of stomach ulcers - Rusha Modi
It's a common misconception that stomach ulcers are caused by emotional upset, psychological distress, or spicy food. Yet no convincing study has ever demonstrated that these factors directly cause ulcer disease. So what does cause...
TED-Ed
TED-Ed: Got seeds? Now add bleach, acid and sandpaper - Mary Koga
For a seed to start growing, its embryo must emerge from its hard coat. In nature the embryo is aided by frost and animal digestion -- but humans can help too. Nicking, filing, and soaking the seed in hot water or acid are all forms of...
Crash Course
Carboxylic Acids: Crash Course Organic Chemistry
What do the smells of feet, armpits, vomit, and goats all have in common? (Besides being super gross…) Carboxylic acids! Despite being responsible for some of our least favorite odors, carboxylic acids are also super useful in organic...
SciShow Kids
Why do We Brush Our Teeth?
We all need to do it! Learn why we all should brush our teeth, and how brushing keeps our teeth strong and healthy!
Crash Course
Digestive System, part 2: Crash Course A&P
Nearly 200 years ago, Alexis St. Martin was shot in the stomach. He was saved by local army doctor William Beaumont, but had to live out his remaining years with a gaping hole in the stomach -- allowing Beaumont to learn a lot about how...
SciShow
Why Can't You Digest Grass?
You've probably seen cows enjoying a nice mouthful of grass, but why can't we do the same?
Crash Course
Alcohols, Ethers, and Epoxides: Crash Course Organic Chemistry
What comes to mind when you think of alcohol? Probably alcoholic drinks like beer or wine. But in organic chemistry alcohols are an important and versatile family of compounds. In this episode of Crash Course Organic Chemistry, we’ll use...
SciShow
Getting To Know Cows Inside and Out | Compilation
From being able to eat grass, to changing the weather with their burps: Cows are incredible creatures!
SciShow
Why You Should Never Put Tomatoes in the Fridge!
Without refrigerators, we'd have spoiled milk, moldy cheese, and warm sodas. However, there are some foods that don't fare so well in a chilly fridge, including tomatoes.
Crash Course
Aromatics and Cyclic Compounds - Crash Course Chemistry
What's that smell? Smell's like Organic Chemistry! This week Hank talks about Aromatics and Cyclic Compounds and naming their substituents, resonance as well as common reactions & uses.
--
Table of Contents
Cyclic Organic Compounds &...
Crash Course
Acid-Base Reactions in Solution: Crash Course Chemistry
Last week, Hank talked about how stuff mixes together in solutions. Today, and for the next few weeks, he will talk about the actual reactions happening in those solutions - atoms reorganizing themselves to create whole new substances in...
SciShow
The Strongest Bases in the World
Acids are widely considered to be the scariest chemical compounds of all, but bases can be just as powerful. Most powerful of all are a special class of pH scale-defying bases called superbases!
SciShow
Why Is Fluoride Good for Teeth?
If our teeth are made mostly of calcium, why do we use fluoride to keep them healthy? Quick Questions explains why, and how we finally figured it out.
SciShow
What Makes Sourdough Bread Sour?
With sandwiches and toast, sourdough bread always adds an extra accented flavor to your meals. But where does the signature tartness come from?
SciShow
Why Does Coffee Make You Poop?
It's common knowledge: you drink a lot of coffee, you're definitely going to poop. What isn't common knowledge is why your body reacts that way