TED Talks
TED: Make your actions on climate reflect your words⇥ | Severn Cullis-Suzuki
History has shown us that in moments of crisis, society can truly transform, says environmental educator Severn Cullis-Suzuki. Nearly 30 years ago, at just 12 years old, she spoke at the UN's Earth Summit in hopes of reversing the...
Crash Course
What is Weathering? Crash Course Geography
Weathering breaks down rocks and creates sediments which become the raw materials for other rocks and the formation of our soils. And we call the process of moving that sediment erosion. In today's episode, we're just going to focus on...
Crash Course
Reinforcement Learning
Reinforcement learning is particularly useful in situations where we want to train AIs to have certain skills we don’t fully understand ourselves. Unlike some of the techniques we’ve discussed so far, reinforcement learning generally...
TED Talks
TED: What does it mean to be a citizen of the world? | Hugh evans
Hugh evans started a movement that mobilizes "global citizens," people who self-identify first and foremost not as members of a state, nation or tribe but as members of the human race. In this uplifting and personal talk, learn more...
Crash Course
Freedom of Speech: Crash Course Government and Politics
Today, FINALLY, Craig is going to talk about Free Speech! Now, free speech is so important because it not only allows you to critique the government, but it also protects you from the government. But it's essential to remember that not...
SciShow
Does Hand Sanitizer Create Superbugs?
Alcohol-based hand sanitizers are an effective way to kill a myriad of potentially harmful microbes. But is there a risk of germs becoming resistant to this ubiquitous liquid?
Crash Course
The Nervous System, Part 2 - Action! Potential!: Crash Course A&P
What do you and a sack of batteries have in common? Today, Hank explains. -- Table of Contents: Ion Channels Regulate Electrochemistry to Create Action Potential 4:51 Resting State 3:22 Depolarization 6:09 Repolarization 7:35...
TED Talks
Kare Anderson: Be an opportunity maker
We all want to use our talents to create something meaningful with our lives. But how to get started? (And ... what if you're shy?) Writer Kare Anderson shares her own story of chronic shyness, and how she opened up her world by helping...
TED Talks
TED: A realistic vision for world peace | Jody Williams
Nobel Peace laureate Jody Williams brings tough love to the dream of world peace, with her razor-sharp take on what "peace" really means, and a set of profound stories that zero in on the creative struggle -- and sacrifice -- of those...
TED Talks
Katharine Wilkinson: How empowering women and girls can help stop global warming
If we really want to address climate change, we need to make gender equity a reality, says writer and environmentalist Katharine Wilkinson. As part of Project Drawdown, Wilkinson has helped scour humanity's wisdom for solutions to draw...
TED Talks
TED: The mission to create a searchable database of Earth's surface | Will Marshall
What if you could search the surface of the Earth the same way you search the internet? Will Marshall and his team at Planet use the world's largest fleet of satellites to image the entire Earth every day. Now they're moving on to a new...
TED-Ed
TED-Ed: Why do we itch? - Emma Bryce
The average person experiences dozens of individual itches each day. We've all experienced the annoyance of an inconvenient itch - but have you ever pondered why we itch in the first place? Is there actually an evolutionary purpose to...
TED-Ed
TED-Ed: Can you survive nuclear fallout? - Brooke Buddemeier and Jessica S. Wieder
Nuclear weapons are some of the most powerful tools of destruction on Earth, and the full scope of a nuclear detonation is almost unimaginable. However, there is a scientifically supported plan of action that could save thousands of...
Crash Course
Aristotle & Virtue Theory: Crash Course Philosophy
This week we explore final ethical theory in this unit: Aristotle’s virtue theory. Hank explains the Golden Mean, and how it exists as the midpoint between vices of excess and deficiency. We’ll also discuss moral exemplars, and introduce...
TED Talks
TED: How small countries can make a big impact on climate change | Nicola Sturgeon
When it comes to tackling climate change, the size of a country doesn't matter -- it's their ambition that counts, says First Minister of Scotland Nicola Sturgeon. In a rousing talk, she shares examples of small nations -- from Bhutan...
SciShow
Dimmer Switches: Secretly Strobe Lights
Having the ability to dim your lights seems like a pretty simple thing, but modern dimmer switches work in a surprisingly cool way!
TED Talks
TED: electrical experiments with plants that count and communicate | Greg Gage
Neuroscientist Greg Gage takes sophisticated equipment used to study the brain out of graduate-level labs and brings them to middle- and high-school classrooms (and, sometimes, to the TED stage.) Prepare to be amazed as he hooks up the...
MinuteEarth
How Birds Fooled Military Radar
A technology to ignore birds on radar ended up being useful to study and conserve them.
SciShow
Can You Be Allergic To Sunlight?
For you, going outside might mean a sunburn if you're out there too long without enough sunscreen, but for some people, any sun exposure can lead to hives and rashes within minutes!
SciShow
Why Do Peaches Make My Mouth Itch?
Allergies can already be a bummer, but did you know they can eventually stop you from enjoying your favorite foods?
TED Talks
Ian Ritchie: The day I turned down Tim Berners-Lee
Imagine it's late 1990, and you've just met a nice young man named Tim Berners-Lee, who starts telling you about his proposed system called the World Wide Web. Ian Ritchie was there. And ... he didn't buy it. A short story about...
TED Talks
Jennifer Golbeck: Your social media "likes" expose more than you think
Do you like curly fries? Have you Liked them on Facebook? Watch this talk to find out the surprising things Facebook (and others) can guess about you from your random Likes and Shares. Computer scientist Jennifer Golbeck explains how...
SciShow
Earth Doesn’t Orbit the Sun
Understanding gravity can sometimes be a bit of a balancing act, much like the fundamental laws of physics and how they inform what it is exactly that Earth orbits.
SciShow
Why Do Boomerangs Come Back?
Learning to throw a boomerang properly takes a lot of practice. And aerodynamics.