3Blue1Brown
Feynman's Lost Lecture (ft. 3Blue1Brown)
This video recounts a lecture by Richard Feynman giving an elementary demonstration of why planets orbit in ellipses. See the excellent book by Judith and David Goodstein, "Feynman's lost lecture”, for the full story behind this lecture,...
TED-Ed
TED-Ed: Can you solve the riddle and escape Hades? | Dan Finkel
The underworld is overcrowded, and Zeus has ordered Hades to let some spirits out. Hades arranges all the souls of the dead in a line before Cerberus. When one of his three heads bites down on the soul in front of it, they'll get...
SciShow
Why Do You Feel Like You’re Being Watched?
Sometimes it just feels like someone is staring at you, even if you can’t see them. It can be annoying, but our brains have a reason for it.
3Blue1Brown
Linear transformations and matrices | Essence of linear algebra, chapter 3
When you think of matrices as transforming space, rather than as grids of numbers, so much of linear algebra starts to make sense.
3Blue1Brown
But why is a sphere's surface area four times its shadow?
Two proofs for the surface area of a sphere
TED Talks
TED: The era of personal DNA testing is here | Sebastian Kraves
From improving vaccines to modifying crops to solving crimes, DNA technology has transformed our world. Now, for the first time in history, anyone can experiment with DNA at home, in their kitchen, using a device smaller than a shoebox....
SciShow
Will Stress Really Make You Go Gray?
Just like the myth that plucking one gray hair will make three sprout, stress making your hair white isn't actually a thing. Or is it?!
PBS
Dissecting Hypercubes with Pascal's Triangle
What does the inside of a tesseract look like? Pascal's Triangle can tell us.
MinuteEarth
Can Pregnancy Tests Help Beat COVID-19?
The lab-on-a-stick that lets us know if we’re pregnant is a genius bit of technology that can be used to quickly determine everything from whether there are nuts in our chocolate to whether we have COVID.
TED Talks
David S. Rose: How to pitch to a VC
Thinking startup? David S. Rose's rapid-fire TED U talk on pitching to a venture capitalist tells you the 10 things you need to know about yourself -- and prove to a VC -- before you fire up your slideshow.
SciShow
What Would Happen If the Planets Lined Up?
Planetary alignments: They're the favorite astronomical scenario of kooks, con artists, and Hollywood producers everywhere. But has it ever happened? And what would it do to Earth if it did?
TED-Ed
TED-Ed: Activation energy: Kickstarting chemical reactions - Vance Kite
Chemical reactions are constantly happening in your body -- even at this very moment. But what catalyzes these important reactions? Vance Kite explains how enzymes assist the process, while providing a light-hearted way to remember how...
SciShow
The Disappointing Reality of the Asteroid Belt | SciShow Tangents: Asteroids
Welcome to SciShow Tangents, the lightly competitive game show podcast brought to you by the team behind SciShow! For too long, you've only been able to hear SciShow Tangents. Well, no more! SciShow Tangents has officially come to...
Crash Course
Lymphatic System: Crash Course A&P
Today Hank explains your unsung lymphatic system and how it supports cardiovascular function by collecting, filtering, and returning interstitial fluid back into the bloodstream via a system of lymphatic vessels. He also explains the...
Be Smart
Why Seasons Make No Sense
Day by day, country by country, we tend to measure seasons differently.
TED-Ed
TED-ED: The pleasure of poetic pattern - David Silverstein
Humans are creatures of rhythm and repetition. From our breath to our gait: rhythm is central to our experience, and often brings us pleasure. We can find pleasure in the rhythm of a song, or even the rows of an orchard. Of course, too...
TED Talks
TED: Why Indigenous forest guardianship is crucial to climate action | Nonette Royo
Indigenous communities have looked after their ancestral forests for millennia, cultivating immense amounts of knowledge on how to protect, nourish and heal these vital environments. Today, 470 million Indigenous people care for and...
TED Talks
Fang Ruan: Management lessons from Chinese business and philosophy
Business management in China is changing, says consultant Fang Ruan. Learn how Chinese entrepreneurs -- long guided by Confucianism's emphasis on authority and regulation -- are now looking to Taoist philosophy for a new, dynamic...
TED Talks
Yang Lan: The generation that's remaking China
Yang Lan, a journalist and entrepreneur who's been called "the Oprah of China," offers insight into the next generation of young Chinese citizens -- urban, connected (via microblogs) and alert to injustice.
TED-Ed
TED-ED: Making sense of irrational numbers - Ganesh Pai
Like many heroes of Greek myths, the philosopher Hippasus was rumored to have been mortally punished by the gods. But what was his crime? Did he murder guests or disrupt a sacred ritual? No, Hippasus's transgression was mathematically...
MinutePhysics
How to Count Infinity
"Some infinities are bigger than other infinities" - Hazel Grace Lancaster, in "The Fault in Our Stars," by John Green
Bozeman Science
Position vs. Time Graph - Part 1
Mr. Andersen shows you how to interpret a position vs. time graph for an object with constant velocity. The slope of the line is used to find the velocity. A phet simulation is also included.
PBS
What Physics Teachers Get Wrong About Tides!
We all know tides have something to do with gravity from the Moon and Sun, but if gravity affects the motion of all objects equally, then how come oceans have large tides while other bodies of water don't? It's because your mental...
Bozeman Science
Magnetic Dipole Moment
The magnetic dipole moment is the torque experienced by a material placed in a magnetic field. The magnetic dipole is an intrinsic property at the magnet, domain, atom, and electron level. A magnetic dipole creates magnetic fields that...