Bozeman Science
Positive and Negative Feedback Loops
Paul Andersen explains how feedback loops allow living organisms to maintain homeostasis. He uses thermoregulation in mammals to explain how a negative feedback loop functions. He uses fruit ripening to explain how a positive feedback...
TED-Ed
TED-Ed: What Aristotle and Joshua Bell can teach us about persuasion - Conor Neill
Imagine you are one of the world's greatest violin players, and you decide to conduct an experiment: play inside a subway station and see if anyone stops to appreciate when you are stripped of a concert hall and name recognition. Joshua...
TED Talks
How to have constructive conversations | Julia Dhar
We need to figure out how we go into conversations not looking for the victory, but the progress, says world debate champion Julia Dhar. In this practical talk, she shares three essential features of productive disagreements grounded in...
Bozeman Science
Homeostatic Loops
Paul Andersen describes four important homeostatic loops in biology. He begins with a brief description of the elements of a homeostatic loop. He then describes how the hypothalamus helps us maintain a stable internal body temperature....
TED Talks
TED: A funny look at the unintended consequences of technology | Chuck Nice
Technology should work for us, but what happens when it doesn't? Comedian Chuck Nice explores the unintended consequences of technological advancement and human interaction -- with hilarious results.
SciShow
HIV vs. AIDS & Ash the Chinchilla: SciShow Talk Show #19
Clinical Sexologist and Sexplanations Host Lindsey Doe teaches Hank the difference between HIV and AIDS. Then Chinchilla Ash teaches Hank about softness. Chapters View all LINDSEY DOE 0:19 IMMUNODEFICIENCY 2:38 STAGE 1: ACUTE INFECTION...
SciShow
What's It Like on ... Venus?
SciShow Space takes you on a tour of Venus, a world with such an extreme environment that you might call it "Earth's evil twin."
Crash Course Kids
Architecture Adventure
If we want to build a place for us to live, or to hang out, or do eat dinner with our friends, we're going to need a special kind of engineering called architecture. In this episode of Crash Course Kids, Sabrina gets us to help her build...
Crash Course
Muscles, part 2 - Organismal Level: Crash Course A&P
Hank calls in a friend to do his push ups for him today to explain how skeletal muscles work together to create and reverse movements. Hank and Claire also demonstrate the role size plays in motor units, the three phase cycle of muscle...
Bozeman Science
Center of Mass
In this video Paul Andersen explains how the center of mass of an object represents the average position of matter in an object. The center of mass of a system is a combination of all the objects within the system. As long as no external...
TED-Ed
TED-ED: The mathematics of sidewalk illusions - Fumiko Futamura
Have you ever come across an oddly stretched image on the sidewalk, only to find that it looks remarkably realistic if you stand in exactly the right spot? These sidewalk illusions employ a technique called anamorphosis - a special case...
3Blue1Brown
Exponential growth and epidemics
A primer on exponential and logistic growth, with epidemics as a central example
Crash Course
Reaching Breaking Point: Materials, Stresses, & Toughness: Crash Course Engineering #18
Today we’re going to start thinking about materials that are used in engineering. We’ll look at mechanical properties of materials, stress-strain diagrams, elasticity and toughness, and describe other material properties like hardness,...
SciShow
Why Do Our Eyes Move When We Think?
You might have heard the myth that you can tell when someone is lying based on how their eyes move. While that is not exactly true, there has been plenty of science that looks into where and how we look when we think.
SciShow
Obesity
Hank tells us some of the surprising things that could be causing or contributing to the obesity epidemic.
SciShow
What Happens When You Stop Eating?
You know what starvation is, but do you know what it does to you? Hank walks you through the three major metabolic phases of starvation, from burning sugars to, basically, self-cannibalism.
TED-Ed
TED-Ed: What is Zeno's Dichotomy Paradox? - Colm Kelleher
Can you ever travel from one place to another? Ancient Greek philosopher Zeno of Elea gave a convincing argument that all motion is impossible - but where's the flaw in his logic? Colm Kelleher illustrates how to resolve Zeno's Dichotomy...
Crash Course
Measures of Spread - Crash Course Statistics
Today, we're looking at measures of spread, or dispersion, which we use to understand how well medians and means represent the data, and how reliable our conclusions are. They can help understand test scores, income inequality, spot...
Bozeman Science
Wave Superposition
In this video Paul Andersen explains how waves interact when moving through one another. Unlike particles waves can interfere both constructively and destructively. The amount of interference is determined through the superposition...
MinutePhysics
What is a Dimension (In 3D... and 2D... and 1D)
In this episode we talk about dimensions and how we know that we live in 3D (or do we?).
SciShow
Cryonics: Could We Really Bring People Back to Life?
You put a dying person in suspended animation until, possibly thousands of years from now, medical science is able to cure them... or their brain can be put in a sweet robot body. It's an age-old sci-fi trope, but there are scientists...
SciShow
Why Do Stars Twinkle?
SciShow explains why stars do that twinkling that all the kids are singing about, and explains how astronomers can get around it to make observations, and why it can be kinda useful.
Amoeba Sisters
Enzymes (Updated)
The Amoeba Sisters explain enzymes and how they interact with their substrates. Vocabulary covered includes active site, induced fit, coenzyme, and cofactor. Also the importance of ideal pH and temperatures for enzymes are discussed.