TED Talks
Joshua Silver: Adjustable liquid-filled eyeglasses
Josh Silver delivers his brilliantly simple solution for correcting vision at the lowest cost possible -- adjustable, liquid-filled lenses. At TEDGlobal 2009, he demos his affordable eyeglasses and reveals his global plan to distribute...
TED Talks
TED: 3 lessons on decision-making from a poker champion | Liv Boeree
Is it better to be lucky or good? Should we trust our gut feelings or rely on probabilities and careful analysis when making important decisions? In this quick talk, professional poker player Liv Boeree shares three strategies she's...
PBS
Quantum Vortices and Superconductivity + Challenge Answers
Scientists studying quantum vortices and their impact on superconductivity just won the Nobel Prize.
Be Smart
How Many Trees Are There?
It may be an impossible questions, but we can at least get close.
SciShow
World’s Most Asked Questions How Old is Earth
People ask Google everything under the sun. One of the most commonly searched questions in the world is “How old is Earth?” SciShow has the answer!
SciShow
Can Roller Coasters Help You Pass Kidney Stones?
Are you having trouble with kidney stones? Well, the scientists might have found a fun way to help you. And here's some updates for our Earth's climate change!
SciShow
Why Can't I Pee in Public Bathrooms?
Paruresis or “Shy Bladder Syndrome” is the inability to pee in public. If this sounds like you, have hope; it’s super treatable!
SciShow
How Moon Rocks Revolutionized Astronomy
Getting our hands on a few moon rocks radically changed our understanding of the solar system!
Crash Course
Degrees of Freedom and Effect Sizes - Crash Course Statistics
Today we're going to talk about degrees of freedom - which are the number of independent pieces of information that make up our models. More degrees of freedom typically mean more concrete results. But something that is statistically...
SciShow
Are Modern Humans Really Older Than We Thought?
Until recently, fossil evidence for modern humans has only gone back 200,000 years. A new discovery in Morocco and thermoluminescence dating may help extend that beyond 300,000 years. Chapters View all Homo sapiens 0:09...
SciShow
Why We Didn't Know How Long a Venus Day Was
Researchers have finally determined how long a day on Venus is, give or take an episode of Brooklyn 99.
3Blue1Brown
Bayes theorem
A visual way to think about Bayes' theorem, together with discussion on what makes the laws of probability more intuitive.
MinuteEarth
The Tiger Invasion: From the Wild to Texas Backyards
This video discusses the issue of tiger ownership in Texas, where there are more tigers in captivity than in the wild. It explores the reasons behind this phenomenon, such as the lack of laws against owning tigers and the successful...
SciShow
How Many Galaxies Are There?
We've been trying to count the galaxies in the universe since the mid '90s, but our estimates change as our tools improve. So what does our current estimate really mean?
SciShow
Why Do Heart Cells Turn into Bone?
It's no surprise that heart tissue and bone tissue have really different jobs. So why does it happen?
MinuteEarth
Why Are There So Many Tigers In Texas?
Why there will likely soon be more tigers in backyards in Texas than in the wilds of Asia.
SciShow
How Many Stars Are There?
How many stars are there in the universe? This question leads Hank to a couple other questions - How many stars can we see from Earth? How many stars are there in our galaxy? - but the answer to the original question proves elusive.
SciShow
Solving the 70 Million Year “Gap” in Flower Evolution
More than 90% of the plants on Earth are angiosperms, flowering plants whose seeds are enclosed inside fruit. And they’re everywhere -- but exactly how and when these plants came to be so ubiquitous is one of the most stubborn questions...
Crash Course
Confidence Intervals - Crash Course Statistics
Today we’re going to talk about confidence intervals. Confidence intervals allow us to quantify our uncertainty, by allowing us to define a range of values for our predictions and assigning a likelihood that something falls within that...
TED-Ed
TED-Ed: Will there be another pandemic in your lifetime? | TED-Ed
We tend to think of pandemics as unlikely events, but disease outbreaks are surprisingly common. Over the past 400 years, the longest stretch of time without a documented outbreak was just four years. So, what's the probability of...
TED-Ed
TED-ED: A clever way to estimate enormous numbers - Michael Mitchell
Have you ever tried to guess how many pieces of candy there are in a jar? Or tackled a mindbender like: _How many piano tuners are there in Chicago?" Physicist Enrico Fermi was very good at problems like these -- learn how he used the...
SciShow
Are Multivitamins Really Good For You?
People spend billions of dollars every year trying to boost their health with multivitamins- but are they actually good for you?
SciShow
CSI Special Insects Unit: Forensic Entomology
Michael Aranda walks you through the crime-fighting science of forensic entomology, the study of insects used in criminal investigations. As if you needed more reasons to love bugs. But be warned: You might not want to watch this during...
SciShow
The Experiment That May Have Broken Physics | SciShow News
Researchers have made some unexpected readings of mysterious particles called muons, which may make us reexamine the Standard Model in physics.