Crash Course
Natural Hazards: Crash Course Geography
Today we wrap up the first half of our series on physical geography by taking a closer look at natural hazards - which are physical processes like heat waves and cyclones, earthquakes and volcanic eruptions, and floods and droughts. And...
Crash Course
Evaluating Photos & Videos: Crash Course Navigating Digital Information #7
With the amount of fake and doctored photos and videos out there, how can we know what to trust? Most of us are used to thinking that "seeing is believing" but as technology makes it easier and easier to spread unreliable content online...
SciShow
Detecting Earthquakes: AI vs. Citizen Scientists
There are over 13,000 active seismic stations out there, producing far more data than seismologists have time to go through. So, researchers set up a showdown of humans versus machines to sift through all this information and, in the...
SciShow
The Siberian Traps: A 250 Million Year Old Crime Scene
The event that killed the dinosaurs 66 million years ago might be the most famous mass extinction ever, but it's not the only one in Earth’s history, nor is it the worst... not by a long shot.
MinuteEarth
The Department of Redundancy Department
Who needs redundancy? Well, everyone, it turns out.
SciShow
Meteorite Strikes Russia
Earlier today, a 15 meter wide meteor exploded over siberia with the force of several Hiroshima bombs. Over 1200 people were injured, mostly by flying glass. Here, Hank discusses what happenedt, what it means, and comparable events in...
PBS
Extinction by Gamma-Ray Burst
Find out about the last time and the next time the Earth will be hit by a Gamma-ray Burst.
TED Talks
TED: Being young and making an impact | Natalie Warne
At 18, Natalie Warne's work with the Invisible Children movement made her a hero for young activists. She uses her inspiring story to remind us that no one is too young to change the world.
SciShow
Why Is It So Hard to Remember Things Right Now?
If you feel like you’ve been more forgetful than normal recently, you’re definitely not alone. Your memory can have a lot to do with what's happening around you.
SciShow
Can You Actually Die from a Broken Heart?
It turns out this common phrase might have more of a basis in truth than you thought!
TED-Ed
TED-Ed: What creates a total solar eclipse? - Andy Cohen
How can the tiny moon eclipse the sight of the gargantuan sun? By sheer coincidence, the disc of the sun is 400x larger than the disc of the moon, but the sun is 390x farther from Earth -- which means that when they align just right, the...
SciShow
The First Neutron Star Collision We've Ever Seen
The results are in from the neutron star collision this past August! Astronomers are revealing what they've learned so far, with more pure gold research underway!
TED-Ed
TED-ED: The ancient origins of the Olympics - Armand D'Angour
Thousands of years in the making, the Olympics began as part of a religious festival honoring the Greek god Zeus in the rural Greek town of Olympia. But how did it become the greatest show of sporting excellence on earth? Armand D'Angour...
3Blue1Brown
The quick proof of Bayes' theorem
A short explanation of why Bayes' theorem is true, together with discussion on a common misconception in probability
Crash Course
Determinism vs Free Will: Crash Course Philosophy
Do we really have free will? Today Hank explores possible answers to that question, explaining theories like libertarian free will and it’s counterpoint, hard determinism.
TED-Ed
How do you know what's true? | Sheila Marie Orfano
A samurai is found dead in a quiet bamboo grove. One by one, the crime's only known witnesses recount their version of the events. But as they each tell their tale, it becomes clear that every testimony is plausible yet different. And...
SciShow
Why You Probably Can’t Predict Your Own Happiness
Humans generally have a good idea of whether something will make us happy or unhappy, but it turns out we’re not great at knowing exactly how much.
Crash Course
The Binomial Distribution - Crash Course Statistics
Today we're going to discuss the Binomial Distribution and a special case of this distribution known as a Bernoulli Distribution. The formulas that define these distributions provide us with shortcuts for calculating the probabilities of...
TED-Ed
TED-Ed: Can you outsmart this logical fallacy? | Alex Gendler
Meet Lucy. She was a math major in college, and aced all her courses in probability and statistics. Which do you think is more likely: that Lucy is a portrait artist, or that Lucy is a portrait artist who also plays poker? How do we know...
Crash Course
Probability Part 1 Rules and Patterns - Crash Course Statistics
Today we’re going to begin our discussion of probability. We’ll talk about how the addition (OR) rule, the multiplication (AND) rule, and conditional probabilities help us figure out the likelihood of sequences of events happening - from...
SciShow
Studying Supernovas From the Bottom of the Ocean
Stars blowing up is a surprisingly common occurrence, but who would have thought to search the bottom of the ocean if you were trying to study them?!
Crash Course
The History of Life on Earth - Crash Course Ecology
With a solid understanding of biology on the small scale under our belts, it's time for the long view - for the next twelve weeks, we'll be learning how the living things that we've studied interact with and influence each other and...
TED Talks
TED: Imaging at a trillion frames per second | Ramesh Raskar
Ramesh Raskar presents femto-photography, a new type of imaging so fast it visualizes the world one trillion frames per second, so detailed it shows light itself in motion. This technology may someday be used to build cameras that can...
Crash Course
Making Time Management Work for You: Crash Course Business - Soft Skills
Most of us struggle with time management. It's normal. But, things need to get done both at work and in your personal life. So, in this episode of Crash Course Business, Evelyn gives us all some ways to structure our checklist and make...