Be Smart
How Did X Become the Unknown (and so much else)?
X is everywhere and it’s probably thanks to math. But why is x the symbol for the unknown?
SciShow
Are Space Sounds Lies?
If a tree falls in space, and it's frequency is modulated by multiple octaves and digitized, does it make a sound?
PBS
South Africa grapples with reminders of apartheid
Protests in South Africa over a statue of a 19th century diamond magnate
and colonial conqueror set off a national debate two years ago about the
remnants of apartheid. As part of his ongoing series, Culture at Risk,
Jeffrey Brown...
PBS
Islam Struggles for Understanding
The debate on whether to build a mosque near Ground Zero has become a touchy subject for many and raised questions over U.S. views on Islam. Gwen Ifill gets three perspectives from the Rev. Welton Gaddy of The Interfaith Alliance,...
PBS
Despite Virus Fears, Arizona’s Changing Demographic Prepares To Go To The Polls
Across the country, election officials are scrambling to decide how to
adjust to the coronavirus pandemic. Louisiana and Georgia have postponed their primary contests, and candidates have eliminated public rallies entirely. But in...
3Blue1Brown
Change of basis: Essence of Linear Algebra - Part 13 of 15
What is a change of basis, and how do you do it?
3Blue1Brown
Change of basis | Essence of linear algebra, chapter 13
What is a change of basis, and how do you do it?
Bozeman Science
Force-Time Graph
In this video Paul Andersen explains hot the force-time graph can be used to determine the impulse of an object. Since the impulse and the change in momentum are equivalent the graph can also be used to determine the change in momentum...
SciShow
The Brewer Who Secretly Revolutionized Statistics | Great Minds: William Gosset
When you have a study with a small sample size, how do you know that the results represent the broader population? Well, thanks to a brewer who needed to assess beer quality in the early 1900s, we now have a simple statistical test that...
3Blue1Brown
Vectors, what even are they? | Essence of linear algebra, chapter 1
What is a vector? Is it an arrow in space? A list of numbers?
Bozeman Science
Thinking in Patterns - Level 7 - Causal Patterns at Varying Scale
In this video Paul Andersen shows conceptual thinking in a mini-lesson on causal patterns at varying scale. TERMS Patterns - regularity in the world Scale - the relative size or extent of something System - a set of components (e.g....
TED-Ed
TED-Ed: Michelle Brown: What is a butt tuba and why is it in medieval art?
A rabbit attempts to play a church organ, while a knight fights a giant snail and a naked man blows a trumpet with his rear end. These bizarre images, painted with squirrel-hair brushes on vellum or parchment by monks, nuns and urban...
TED-Ed
TED-Ed: Mysteries of vernacular: Zero - Jessica Oreck and Rachael Teel
Though the first written number system can be dated back to 2500 years ago in Mesopotamia, a zero-like symbol did not appear until 7th century CE India. Jessica Oreck and Rachael Teel track the evolution of zero from a dot to the symbol...
TED-Ed
TED-ED: Can you solve the control room riddle? - Dennis Shasha
As your country's top spy, you must infiltrate the headquarters of the evil syndicate, find the secret control panel, and deactivate their death ray. But your reconnaissance team is spotty, and you have only limited information about the...
Crash Course
Mythical Trees: Crash Course World Mythology
This week on CC Myth, Mike Rugnetta is teaching you about mythical trees. There are lots of trees in myth, and we've touched on some of them before, but today we're going to focus on three trees from three different traditions. We'll...
TED Talks
TED: Why Brexit happened -- and what to do next | Alexander Betts
We are embarrassingly unaware of how divided our societies are, and Brexit grew out of a deep, unexamined divide between those that fear globalization and those that embrace it, says social scientist Alexander Betts. How do we now...
Bozeman Science
Thinking in Systems - Level 4 - Hierarchy of Systems
In this video Paul Andersen shows conceptual thinking in a mini-lesson on the hierarchy of systems. TERMS: System interactions - Complex systems - consisting of many different and connected parts Sub-systems - a self-contained system...
TED-Ed
TED-Ed: Can you solve the risky disk riddle? | James Tanton
Your antivirus squad is up against a code that's hijacked your mainframe. What you've learned from other infected systems, right before they went dark, is that it likes to toy with antivirus agents in a very peculiar way— and you're the...
Crash Course
Representing Numbers and Letters with Binary: Crash Course Computer Science
Today, we’re going to take a look at how computers use a stream of 1s and 0s to represent all of our data - from our text messages and photos to music and webpages. We’re going to focus on how these binary values are used to represent...
TED Talks
TED: American bipartisan politics can be saved -- here's how | Bob Inglis
Former Republican member of the u.S. Congress Bob Inglis shares an optimistic message about how conservatives can lead on climate change and other pressing problems -- and how free enterprise (and working together across ideologies) hold...
Bozeman Science
Thinking in Systems - Level 2 - Components and Interactions
In this video Paul Andersen shows conceptual thinking in a mini-lesson on components and interactions within systems. TERMS: System - a set of components (e.g. things) working together Components - a part of a larger whole Interactions -...
PBS
Why Computers are Bad at Algebra
The answer lies in the weirdness of floating-point numbers and the computer's perception of a number line.
TED-Ed
TED-Ed: How high can you count on your fingers? (Spoiler: much higher than 10) - James Tanton
How high can you count on your fingers? It seems like a question with an obvious answer. After all, most of us have ten fingers -- or to be more precise, eight fingers and two thumbs. This gives us a total of ten digits on our two hands,...