SciShow
Tractor Beams: Almost Real!
Hank tells us about some developments that are being made in the dramatic area of laser tractor beams.
PBS
When Fish First Breathed Air
385 million years ago, a group of fish would undertake one of the most important journeys in the history of life and become the first vertebrates to live on dry ground. But first, they had to acquire the ability to breathe air.
TED-Ed
TED-Ed: Why doesn't the Leaning Tower of Pisa fall over? | Alex Gendler
In 1990, the Italian government enlisted top engineers to stabilize Pisa's famous Leaning Tower. There'd been many attempts during its 800 year history, but computer models revealed the urgency of their situation. The tower would topple...
SciShow
Tsunamis... From the Sky?
Scientists have developed reliable early warning systems for tsunamis caused by earthquakes. The problem is, earthquakes aren't the only things that cause tsunamis.
3Blue1Brown
But why is a sphere's surface area four times its shadow?
Two proofs for the surface area of a sphere
Be Smart
What Are Rainbows?
Dorothy went over one. LeVar Burton read to us under one. In a song, Kermit the Frog connected us to one. Even Mork's suspenders were made of them. Our culture, and our skies, are full of rainbows, but do you know how they form? Do we...
SciShow
Why Do Boomerangs Come Back?
Learning to throw a boomerang properly takes a lot of practice. And aerodynamics.
SciShow
Why Is It so Hard to Swat a Fly?
Flies are evasive buzzing machines that make it nearly impossible to swat. Luckily, science has some explanation to help you predict their next move.
SciShow
These Beetles Are Bright and Shiny… For Camouflage
Jewel beetles are pretty eye-catching with their glossy, bright coloration. But if you were a small creature that needed to avoid predators, you might think that eye-catching is the last thing you'd want to be. But it turns out that...
SciShow
Why Am I Upside-Down When I Look in a Spoon?
We'd like to know why you're staring at yourself in a spoon in the first place. But we can at least answer the question of why you look upside-down when you do.
Be Smart
How The Pyramids Were Built (Pyramid Science Part 2)
Just because something is difficult doesn't mean it's impossible. Over the past centuries, archaeologists, historians, and engineers have reconstructed a great deal of the technology and science used to build the Egyptian pyramids. This...
Crash Course
Cycles in the Sky
This week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe.
Crash Course
Vectors and 2D Motion: Crash Course Physics
Continuing in our journey of understanding motion, direction, and velocity... today, Shini introduces the ideas of Vectors and Scalars so we can better understand how to figure out motion in 2 Dimensions. But what does that have to do...
SciShow
The Strange Effects of Diamond Dust
Bright pillars of light... clouds of glowing dust... shimmering discs floating around the sun... signs of extraterrestrial activity, or is there a more rational and scientific explanation for this phenomenon?
SciShow
How Do We Measure the Distance of Stars?
It's School of YouTube Week! Comic Relief and YouTube are partnering to send students to school! The Bad Astronomer Phil Plait teaches Hank how to measure the distance to the stars.
Crash Course
Ampère's Law: Crash Course Physics
Hans Christian Oersted had just discovered the connection between electricity and magnetism. Meanwhile, a French physicist named André-Marie Ampère was experimenting with some wires, trying to learn more about the connection between...
Be Smart
Much A-Do About Hair
All mammals have hair at some point in their lives, but none of them wear it quite like humans. Why does our hair grow where it does, and not grow where it doesn't? How does our hair get its color? And why does it go gray and often fall...
Bozeman Science
Elementary Reactions
In this video Paul Andersen explains that elementary reactions are steps within a larger reaction mechanism. Colliding molecules require sufficient energy and proper orientation to break bonds and form new bonds. A unimolecular...
MinutePhysics
TOP 10 REASONS Why We Know the Earth is Round
TOP 10 REASONS Why We Know the Earth is Round
SciShow
5 Inventions Showing Us the Future of Solar Energy
When you imagine the energy of the future, solar power is probably in the picture – but in recent years, less than 2% of the world’s electricity has come from solar power. Here are 5 new inventions that are likely to change that.
TED-Ed
TED-Ed: Can you solve the vampire hunter riddle? - Dan Finkel
You’re a vampire hunter entering the enemy’s lair. Can you outsmart this tricky brainteaser and vanquish the vampires? -- You’ve stealthily descended into the darkness of a vampire cave, setting a sequence of mirrors as you go. When the...
Crash Course
Stress, Strain & Quicksand: Crash Course Engineering #12
Today we’re talking all about fluid mechanics! We’ll look at different scales that we work with as engineers, mass and energy transfers, the no-slip condition, stress and strain, Newton’s law of viscosity, Reynold’s number, and more!
Bozeman Science
Light Absorption, Reflection, and Transmission
In this video Paul Andersen explains how light can be absorbed, reflected, or transmitted as it moves from one medium to another. The reflection of different wavelengths creates the perceived color of an object. Absorbed light is...
Bozeman Science
Rotational Motion
In this video Paul Andersen explains how a net torque acting on an object will create rotational motion. This motion can be described by the angular displacement, angular velocity, and angular acceleration. The linear velocity can be...