SciShow
Will the Moon Ever Leave the Earth's Orbit?
Every year the moon’s orbit gets a little bigger and it moves just a little farther away. Should we worry about the Moon breaking free?
TED-Ed
TED-ED: The coin flip conundrum - Po-Shen Loh
When you flip a coin to make a decision, there's an equal chance of getting heads and tails. But what if you flip the coin repeatedly, so that one option would win as soon as two heads showed up in a row, and another would win as soon as...
MinuteEarth
Why Apple Pie Isn't American
Our diets are more global than we realize, because our common food crops and animals were domesticated far away in diverse locations. __________________________________________ If you want to learn more about this topic, start your...
Crash Course
Passing Gases: Effusion, Diffusion and the Velocity of a Gas - Crash Course Chemistry
We have learned over the past few weeks that gases have real-life constraints on how they move here in the non-ideal world. As with most things in chemistry (and also in life) how a gas moves is more complex than it at first appears. In...
TED-Ed
TED-Ed: The chemistry of cold packs - John Pollard
If you stick water in the freezer, it will take a few hours to freeze into ice. How is it, then, that cold packs go from room temperature to near freezing in mere seconds? John Pollard details the chemistry of the cold pack, shedding...
SciShow
3 Strategies to (Kind of) Change Someone’s Opinions
You might not be able to completely reverse a person’s stance on any given issue, but you might be able to change their mind a little by presenting your argument in just the right way.
TED-Ed
TED-Ed: Game theory challenge: Can you predict human behavior? | Lucas Husted
Given a range of integers from 0 to 100, what would the whole number closest to 2/3 of the average of all numbers guessed be? For example, if the average of all guesses is 60, the correct guess will be 40. The game is played under...
Crash Course
Geometric Distributions and The Birthday Paradox - Crash Course Statistics
Geometric probabilities, and probabilities in general, allow us to guess how long we'll have to wait for something to happen. Today, we'll discuss how they can be used to figure out how many Bertie Bott's Every Flavour Beans you could...
TED Talks
TED: Keep your goals to yourself | Derek Sivers
After hitting on a brilliant new life plan, our first instinct is to tell someone, but Derek Sivers says it's better to keep goals secret. He presents research stretching as far back as the 1920s to show why people who talk about their...
Bozeman Science
Kinetic Theory and Temperature
In this video Paul Andersen explains how the macroscopic measure of temperature can be related to the average kinetic energy of molecules in motion. The Boltzmann constant and distribution can be used to calculate the root mean square...
SciShow
Why You’re More Afraid of Sharks Than Cows
Tons of people are afraid of sharks, but the reasons have a lot more to do with how our brains deal with risk than anything to do with these super cool sea critters. Heads up: This video contains footage of sharks.
Crash Course
How P-Values Help Us Test Hypotheses - Crash Course Statistics
Today we're going to begin our three-part unit on p-values. In this episode we'll talk about Null Hypothesis Significance Testing (or NHST) which is a framework for comparing two sets of information. In NHST we assume that there is no...
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
Standard Deviation
In this video Paul Andersen explains the importance of standard deviation. He starts with a discussion of normal distribution and how the standard deviation measures the average distance from the mean, or the "spread" of data. He then...
SciShow
The Real Reason It's So Hard to Lose Weight
You probably know that losing weight is really hard. But it may not be just because of your cheat day frequency; your body actually fights back to make losing weight harder.
Crash Course
Confidence Intervals - Crash Course Statistics
Today we’re going to talk about confidence intervals. Confidence intervals allow us to quantify our uncertainty, by allowing us to define a range of values for our predictions and assigning a likelihood that something falls within that...
TED Talks
Hans Rosling: The good news of the decade? We're winning the war against child mortality
Hans Rosling reframes 10 years of UN data with his spectacular visuals, lighting up an astonishing -- and under-reported -- piece of front-page good news: We're winning the war against child death. Along the way, he debunks one flawed...
Bozeman Science
Standard Error
Paul Andersen shows you how to calculate the standard error of a data set. He starts by explaining the purpose of standard error in representing the precision of the data. The standard error is based on the standard deviation and the...
SciShow
5 Things We Still Get Wrong About Human Reproduction
You'd think we'd know everything there is to know about sexual reproduction. But as it turns out, there are still quite a few things we picked up that aren't exactly true, and we're here to correct that. Chapters NEW EGGS 1:47 MENSTRUAL...
SciShow
Does Everyone Have a ‘Midlife Crisis’?
Midlife crises are a common plot device in films, TV shows, and books. Like most psychological phenomena, though, they don’t always get it quite right.
TED-Ed
TED-ED: Why incompetent people think they're amazing - David Dunning
How good are you with money? What about reading people's emotions? How healthy are you, compared to other people you know? Knowing how our skills stack up against others is useful in many ways. But psychological research suggests that...
Bozeman Science
PS2C - Stability and Instability in Physical Systems
Paul Andersen explains how physical systems remain stable and unstable over time. The sum total of interactions acting on the system determine its stability. Feedback loops are used to maintain stability but require energy. If the energy...
SciShow
Are Electric Cars Really More Environmentally Friendly?
Some people say that buying an electric car is a great way to fight climate change - but if they use electricity that is made by burning fossil fuels, are they really more environmentally friendly than gas powered cars?