PBS
The Holographic Universe Explained
The holographic principle emerged from many subtle clues – clues discovered over decades of theoretical exploration of the universe. Over the past several months on Space Time, we’ve seen those close clues, and we’ve built a the...
PBS
What Happens After the Universe Ends?
Conformal Cyclic Cosmology is a story of the origin and the end of our universe from great mathematical physicist Sir Roger Penrose. It’s goes like this: the infinitely far future, when the universe has expanded exponentially to to an...
PBS
What’s On The Other Side Of A Black Hole?
Normal maps are useless inside black holes. At the event horizon - the ultimate point of no return as you approach a black hole - time and space themselves change their character. We need new coordinate systems to trace paths into the...
PBS
What’s Your Brain’s Role in Creating Space & Time?
Physics is the business of figuring out the structure of the world. So are our brains. But sometimes physics comes to conclusions that are in direct conflict with concepts fundamental to our minds, such as the realness of space and time....
MinutePhysics
Why Penrose Tiles Never Repeat
This video is about a better way to understand Penrose tilings (the famous tilings invented by Roger Penrose that never repeat themselves but still have some kind of order/pattern).
TED-Ed
TED-Ed: Are solar panels worth it? | Shannon Odell
Today in many countries solar is the cheapest form of energy to produce. Millions of homes are equipped with rooftop solar, with most units paying for themselves in their first seven to 12 years and then generating further savings. So,...
TED Talks
TED: A faster way to get to a clean energy future | Ramez Naam
When it comes to cost, clean energy is bound to beat out fossil fuels, says technologist Ramez Naam. But the hesitancy to build amid the prevalence of "not in my backyard" campaigns is preventing the creation of our sustainable future....
TED Talks
TED: What if buildings created energy instead of consuming it? | Ksenia Petrichenko
Buildings are bad news for the climate -- but they don't have to be. While our structures are currently responsible for a third of global energy consumption and emissions, a future where they create more energy than they consume is...
PBS
The current hurdles to putting more electric vehicles on the road
In last week's State of the Union, President Biden reaffirmed his administration's commitment to get more electric vehicles in American driveways. It's estimated that half of all new vehicle sales will be EVs by 2030, but the industry...
PBS
How Social Entrepreneurs Use Rice Husks to Fuel Micro Power Grids in India (January 17, 2013)
India suffers from chronic power interruptions and failures stemming from energy policies created to court voter blocs. Special correspondent Fred de Sam Lazaro reports on efforts by social entrepreneurs to solve part of India's power...
3Blue1Brown
Three-dimensional linear transformations: Essence of Linear Algebra - Part 5 of 15
How to think of 3x3 matrices as transforming 3d space
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?
3Blue1Brown
Fractals are typically not self-similar
What exactly are fractals? A common misconception is that they are shapes which look exactly like themselves when you zoom in. In fact, the definition has something to do with the idea of "fractal dimension".
3Blue1Brown
Fractals are typically not self-similar
What exactly are fractals? A common misconception is that they are shapes which look exactly like themselves when you zoom in. In fact, the definition has something to do with the idea of "fractal dimension".
TED-Ed
TED-Ed: How optical illusions trick your brain - Nathan S. Jacobs
Optical illusions are images that seem to trick our minds into seeing something different from what they actually are. But how do they work? Nathan S. Jacobs walks us through a few common optical illusions and explains what these tricks...
TED Talks
Rahul Mehrotra: The architectural wonder of impermanent cities
Every 12 years, a megacity springs up in India for the Kumbh Mela religious festival -- what's built in ten weeks is completely disassembled in one. What can we learn from this fully functioning, temporary settlement? In a visionary...
TED Talks
Amory Lovins: A 40-year plan for energy
In this intimate talk filmed at TED's offices, energy innovator Amory Lovins shows how to get the US off oil and coal by 2050, $5 trillion cheaper, with no Act of Congress, led by business for profit. The key is integrating all four...
MinutePhysics
How to Build a Lava Moat (with xkcd)
The world's most entertaining and useless self-help guide, from the brilliant mind behind the wildly popular webcomic xkcd and the #1 New York Times bestsellers What If? and Thing Explainer For any task you might want to do, there's a...
TED-Ed
How much electricity does it take to power the world? | TED-Ed
All around the world, millions of people are flipping a switch, plugging in, and pressing an 'on' button every second. So how much electricity does humanity use? And how much will we need in the future? Discover how much energy it takes...
TED Talks
TED: An action plan for solving the climate crisis | John Doerr and Ryan Panchadsaram
How much more damage do we have to endure before we realize that it's cheaper to save this planet than to ruin it? asks engineer and investor John Doerr. In conversation with Countdown cofounder Lindsay Levin, Doerr and systems innovator...
TED Talks
Rose M. Mutiso: How to bring affordable, sustainable electricity to Africa
Energy poverty, or the lack of access to electricity and other basic energy services, affects nearly two-thirds of Sub-Saharan Africa. As the region's population continues to increase, so will the need to build a new energy system to...
TED-Ed
TED-Ed: Will future spacecraft fit in our pockets? - Dhonam Pemba
When you picture a rocket, you might imagine a giant ship carrying lots of fuel, people and supplies. But what if the next wave of spacecraft were small enough to fit into our pockets? Dhonam Pemba details the future of microspacecraft,...
SciShow
Why Does the US Have So Many Power Outages?
The United States has a lot more power outages than other countries do, and fixing this problem will be a massive undertaking. Chapters View all Across the United States, the average customer loses power about once or twice a year, for a...