Crash Course
Geometric Optics: Crash Course Physics
LIGHT! Let's talk about it today. Sunlight, moonlight, torchlight, and flashlight. They all come from different places, but they’re the very same thing: light! It’s what makes it possible for us to see the world around us, so it’s worth...
Crash Course
Light Is Waves: Crash Course Physics
The way light behaves can seem very counter intuitive, and many physicists would agree with that, but once you figure out light waves it all starts to make more sense! In this episode of Crash Course Physics, Shini shows us how we know...
Bozeman Science
Ray Diagrams - Mirrors
In this video Paul Andersen explains how ray diagrams can be used to determine the size and location of a reflected image. Ray diagrams for plane, concave, and convex mirrors are included.
Bozeman Science
Electromagnetic Radiation
In this video Paul Andersen details the waves in electromagnetic radiation. There is an inverse relation between the wavelength and frequency of electromagnetic waves. Electromagnetic radiation includes gamma rays, x-rays, infrared...
SciShow Kids
Why Should You Wear Sunscreen?
Jessi and Squeaks are ready to go outside, but before they do, Jessi needs to make sure to put on sunscreen so that she doesn't get a sunburn!
TED-Ed
TED-Ed: Performing brain surgery without a scalpel | Hyunsoo Joshua No
Every year, tens of thousands of people have brain surgery without a single incision: there's no scalpel, no operating table, and the patient loses no blood. Instead, this procedure uses a machine that emits invisible beams of light at a...
TED-Ed
TED-Ed: How X-rays see through your skin - Ge Wang
Originally discovered by accident, X-rays are now used about 100 million times a year in clinics around the world. How do these magic eyes work? Ge Wang details the history and mechanics of the X-ray machine and CT scanners.
SciShow
Hydrogen Bonding…but With Carbon | Great minds: June Sutor
Proteins, and by extension our bodies, depend on the fact that atoms are arranged, spaced, and linked to each other in specific ways. And thanks to June Sutor, we have a better understanding of how those atoms come together and interact...
Crash Course
The History of Atomic Chemistry: Crash Course Chemistry
How did we get here? Well, in terms of Atomic Chemistry, Hank takes us on a tour of the folks that were part of the long chain of other folks who helped us get to these deeper understandings of the world. From Leucippus to Heisenberg to...
SciShow Kids
Visiting the Dentist!
This video is brought to you by the Child and Teen Checkups program of the Minnesota Department of Health.
Crash Course
Telescopes
Today Phil explains how telescopes work and offers up some astronomical shopping advice.
Curated Video
The Insane power of a Hypernova
Stars represent a celestial battle of two opposing forces, gravity trying to collapse the star, and radiation pressure trying to explode the star. But it comes to an end close to the time that it runs out of fuel. Gravity then collapses...
Curated Video
Sunscreen Protection Experiment - Summer Science Series
How important is it to wear sunscreen when out in the Sun. Find out with this simple experiment!
Curated Video
How to Protect a Baby from the Sun
Howcast - There’s no reason you and your baby can’t have fun in the sun—as long as she doesn’t catch too many rays.
Curated Video
Warhammer 40K Space Marine Walkthrough Part 25: The Weapon
Howcast - Check out part 26 of this walkthrough for the third person action shooter "Warhammer 40K Space Marine" and beat Chapter 3 with this online demo.
Curated Video
7 Cool Facts about Waxy Monkey Frogs
Howcast - Learn seven cool facts about waxy monkey frogs from reptile and amphibian expert Jungle Bob in this Howcast video.
Curated Video
UVA Rays vs. UVB Rays
Howcast - Learn the difference between UVA rays and UVB rays from licensed esthetician Joanna Vargas in this Howcast video.
Curated Video
How to Avoid a Sunburn
Howcast - Learn how to avoid a sunburn from licensed esthetician Joanna Vargas in this Howcast video.
Curated Video
Why Stingrays Love Eating Their Meals Like Kabobs
It's breakfast time at the South Carolina aquarium's stingray tank.
Curated Video
Did You Know Stingrays Enjoy Their Meals ‘Kabob’ Style?
It's breakfast time at the South Carolina aquarium's stingray tank.
Curated Video
Stingrays Are Some of the Most Interesting Creatures in the World!
Visit the stingray tank at feeding time and get a closer look at these creatures made up completely of cartilage.
Curated Video
Feeding Time For These Atlantic and Southern Stingrays Is Something to Behold
Visit the stingray tank at feeding time and get a closer look at these creatures made up completely of cartilage.
Curated Video
Check Out The Underside of a Stingray As It Snacks
You've probably seen what a stingray looks like from above, but have you ever seen the underside where their mouth and nostrils are?
Curated Video
Feeding Time! This is How a Stingray Eats at the South Carolina Aquarium (Kabob Style)
It's breakfast time at the South Carolina aquarium's stingray tank.