MinutePhysics
Why It's Impossible to Tune a Piano
Pianos can't be perfectly tuned - it's a mathematical fact!
MinutePhysics
Relativistic Addition of Velocity | Special Relativity Ch. 6
This video is chapter 6 in my series on special relativity, and it covers the topic of relativistic addition of velocity: aka, how things that are moving relative to one inertial reference frame, which is moving relative to another...
MinutePhysics
Misconceptions Footnote †: Randomness and Feedback
Footnote to the main video here: https://youtu.be/HUti6vGctQM Feedback loops and spurious correlations! REFERENCES: Spurious correlations: http://www.tylervigen.com/spurious-correlations Loopy by Nicky Case: http://ncase.me/loopy/...
MinuteEarth
How Risky Are Vaccines?
Want to learn more about the topic in this week's video? Here's a keyword to get your googling started: herd immunity: immunity that occurs when the vaccination of a portion of a population provides protection for individuals who have...
TED Talks
Media Polarization and the Erosion of Accountability in American Democracy
President and founder of Eurasia Group and GZERO Media Ian Bremmer highlights the increasing polarization of the American media landscape, noting how media outlets like MSNBC and Fox offer divergent narratives that contribute to social...
TED-Ed
TED-Ed: The tech that seems to break the laws of physics | Anna Rothschild
Typically, with any piece of technology, you pump one unit of energy in and you get about one out. That’s just the first law of thermodynamics: energy has to be conserved. But there’s a piece of technology called a heat pump, where for...
TED-Ed
TED-Ed: These animals can hear everything | Jakob Christensen-Dalsgaard
The world is always abuzz with sounds, many of which human ears simply can’t hear. However, other species have extraordinary adaptations that grant them access to realms of sonic extremes. And some of them don’t even have ears— at least,...
TED Talks
TED: Lessons from people already adapting to the climate crisis | Dorcas Naishorua
The Maasai people have lived sustainably off the savanna for centuries, raising cattle for sustenance and income. Climate activist Dorcas Naishorua paints a picture of how the climate crisis is threatening their way of life — and calls...
SciShow
How Lava Turned a Rhino Into a Cave
We know that fossils are fragile, and volcanoes are destructive. So you wouldn't think that volcanoes are really any help when preserving fossils... but you'd be wrong! From the Laetoli Footprints to the Blue Lake Rhino, here are five...
PBS
How Teenagers' Lack of Sleep is Taking a Toll on Their Mental Health
Research has found that teenagers should be getting eight to ten hours of sleep every night. But many are sleeping far less than that and nearly one in four also suffer from insomnia. William Brangham reports on why it's so hard for so...
TED Talks
TED: Why are women still taken less seriously than men? | Mary Ann Sieghart
Women are routinely underestimated, overlooked, interrupted, talked over or mistaken for someone more junior at the workplace. Author Mary Ann Sieghart calls this the "authority gap" — all the ways women are (still) taken less seriously...
TED Talks
TED: A reframing of masculinity, rooted in empathy | Gary Barker
Urging us to turn away from voices perpetuating harmful stereotypes, gender equality advocate Gary Barker shares three insights on fostering a culture of care, compassion and connection among men. "We are the most wired-to-care species...
TED Talks
TED: How to build democracy — in an authoritarian country | Tessza Udvarhelyi
Today, Hungary is in the gray zone between a dictatorship and a democracy, says activist Tessza Udvarhelyi. "This did not happen overnight." In a rousing talk, she reminds us just how close any country can come to authoritarianism — and...
MinutePhysics
How Do We Know The Universe Is Accelerating?
The universe is expanding – this we know from looking at red shifts of distant galaxies – but the acceleration of the universe's expansion is harder to measure. It requires measuring the change of recession velocity over time, and it's...
PBS
Coping With Alzheimer's: A Mother & Daughter Portrait Of Long-Term Care
After being diagnosed with Alzheimer's, professional artist Mary Wyant slowly lost her ability to paint and the ability to take care of herself. Ray Suarez examines the story of Mary and her daughter Rebecca, who is now her mother's...
SciShow
Plasma, The Most Common Phase of Matter in the Universe
Get to know plasma, the most common, but probably least understood, phase of matter in the universe!
MinuteEarth
MinuteEarth Explains: Animal Winners and Losers
In this collection of classic MinuteEarth videos, we keep score on the winners and losers of the animal kingdom. 0:00 - Intro 0:10 - Why Only Some Monkeys Have Awesome Tails • Why Only Some Monkeys Have Awesome Tails 1:57 - Rise Of The...
TED Talks
TED: Meet methane, the invisible climate villain | Marcelo Mena
A landfill on fire doesn't only emit a horrid stench — it has devastating consequences for the environment, too. The culprit is methane, an often underestimated greenhouse gas produced in large part by food systems, organic waste and...
TED Talks
TED: AI is dangerous, but not for the reasons you think | Sasha Luccioni
AI won't kill us all — but that doesn't make it trustworthy. Instead of getting distracted by future existential risks, AI ethics researcher Sasha Luccioni thinks we need to focus on the technology's current negative impacts, like...
PBS
How Muslim and Jewish faith groups are coming together during Israel-Hamas war
The conflict in the Middle East has been a fraught subject for decades, including in the U.S., and especially within American Jewish and Muslim communities. And for almost as long, interfaith groups have sought to bring those communities...
SciShow
How Distant Stars Let Us See the Solar System Up Close
Occultations may sound spooky, but in actuality they can inform us of some of the most unknown parts of the universe.
SciShow
The Mystery of the Star That Wasn't There
In the 1970s, astronomers discovered a mysterious source of gamma rays that, 50 years later, still hasn’t revealed all of its secrets.