Earth and Space Science
Could comets be the source of life on Earth?
Lesson duration 03:38
While comets were historically thought to be ill omens of war and famine, recent science has...
Mathematics
Is math discovered or invented?
Lesson duration 05:11
Would mathematics exist if people didn't? Did we create mathematical concepts to help us...
Geometry
Mile of Pi - Numberphile
Lesson duration 06:28
The team from Numberphile printed one million decimal places of Pi onto a piece of paper...
Mathematics
Is our climate headed for a mathematical tipping point?
Lesson duration 04:11
Scientists have warned that as CO2 levels in the atmosphere rise an increase in Earth’s...
Health
How do germs spread (and why do they make us sick)?
Lesson duration 05:07
Germs are found on almost every surface we come in contact with, which makes it incredibly...
Performing Arts
A different way to visualize rhythm
Lesson duration 05:23
In standard notation, rhythm is indicated on a musical bar line. But there are other ways to...
Science & Technology
Einstein's brilliant mistake: Entangled states
Lesson duration 05:10
When you think about Einstein and physics, E=mc^2 is probably the first thing that comes to...
Science & Technology
Schrödinger's cat: A thought experiment in quantum mechanics
Lesson duration 04:38
Austrian physicist Erwin Schrödinger, one of the founders of quantum mechanics, posed this...
Social Studies
History vs. Christopher Columbus
Lesson duration 05:55
Many people in the United States and Latin America have grown up celebrating the anniversary of...
Science & Technology
Light seconds, light years, light centuries: How to measure extreme distances
Lesson duration 05:29
When we look at the sky, we have a flat, two-dimensional view. So how do astronomers figure the...
Science & Technology
How do we study the stars?
Lesson duration 04:45
Our best technology can send men to the Moon and probes to the edge of our solar system, but...
Health
How do vitamins work?
Lesson duration 04:44
Vitamins are the building blocks that keep our bodies running; they help build muscle and bone,...
Medical Conditions
A brief history of melancholy
Lesson duration 05:29
If you are a living, breathing human being, chances are you have felt sad at least a few times...
Psychology
Is telekinesis real?
Lesson duration 05:23
Telekinesis, the ability to manipulate matter with the mind alone, is a trait exhibited by some...
Science & Technology
If matter falls down, does antimatter fall up?
Lesson duration 02:55
Like positive and negative, or debit and credit, matter and antimatter are equal and opposite. So...
Literature & Language
Who speaks Wukchumni? A vanishing Native American language
Lesson duration 09:28
In this short film, Who Speaks Wukchumni?, we meet a Native American woman named Marie...
Science & Technology
Cloudy climate change: How clouds affect Earth's temperature
Lesson duration 06:40
As the Earth’s surface temperature gradually rises, it has become vital for us to predict the...
Science & Technology
How cosmic rays help us understand the universe
Lesson duration 04:40
We only know 4% of what the universe is made up of. Can we also know what lies beyond our galaxy...
Science & Technology
Where do genes come from?
Lesson duration 04:24
When life emerged on Earth about 4 billion years ago, the earliest microbes had a set of basic...
Design
The history of tattoos
Lesson duration 05:17
If you have a tattoo, you’re part of a rich cultural history that dates back at least 8,000...
Physical Science
What is the Heisenberg Uncertainty Principle?
Lesson duration 04:44
The Heisenberg Uncertainty Principle states that you can never simultaneously know the exact...
Science & Technology
Particles and waves: The central mystery of quantum mechanics
Lesson duration 04:52
One of the most amazing facts in physics is that everything in the universe, from light to...
Science & Technology
The chemistry of cold packs
Lesson duration 04:32
If you stick water in the freezer, it will take a few hours to freeze into ice. How is it, then,...
Physical Science
Two objects. Same room. Two different temperatures?
Lesson duration 03:59
How can two objects have the same temperature but feel like they have different temperatures?...