SciShow
Why Are COVID Fatality Rates Dropping?
Near the end of 2020, we got some puzzling but good news: COVID-19 fatality rates have been dropping. Here are a few factors that might help explain why we’re seeing this trend.
Bozeman Science
AP Biology Labs - part 1
Paul Andersen details the first 7 of 13 labs in the AP Biology Curriculum. The following topics are all covered: Artificial Selection, Hardy-Weinberg Equilibrium, Comparing DNA using BLAST, Diffusion and Osmosis, Photosynthesis,...
Bozeman Science
The Greenhouse Effect
In this video Paul Andersen explains how the greenhouse effect and greenhouse gases keep our planet warm enough to be habitable. He explains how greenhouse gases keep heat closer to the surface. He finally shows how increases in...
MinuteEarth
How Many Mass Extinctions Have There Been?
Want to learn more about the topic in this week's video? Here are some keywords/phrases to get your googling started: - Mass Extinction Event: a significant, global decrease in the diversity of life - "Big 5": The five biggest mass...
Bozeman Science
Intermolecular Potential Energy
In this video Paul Andersen explains the importance of intermolecular forces in chemistry. Intermolecular forces exist between dipoles (like hydrogen bonds), between dipoles and induced dipoles (like Ar and HCl) and between induced...
Bozeman Science
Symbolic Representations
In this video Paul Andersen explains how the conservation of matter can be displayed with both symbolic representations and particulate drawings. A simple conservation of matter problem is also included.
SciShow
Is There Less Oxygen in the Winter Since Its Colder
Plants make oxygen using photosynthesis, but what happens to the air when those trees drop their leaves in winter?
Crash Course
Organometallic Reagents and Carbanions: Crash Course Organic Chemistry
Have you ever wondered why the gas station has “unleaded fuel” but there isn’t a “leaded” option? The answer has to do with a chemical called tetraethyl lead, which is an organometallic compound, or an organic compound with a...
SciShow
Where's My Bloodless Blood Sugar Monitor
There are about 450 million diabetics around the world, and while we do already have a reliable way of measuring blood sugar, it requires patients to prick their finger each time they want a reading. Is there a better way?
MinutePhysics
Do Cause and Effect Really Exist? (Big Picture Ep. 2/5)
Thanks to Google Making and Science for supporting this series, and to Sean Carroll for collaborating on it! This video is about why there's no such thing as cause and effect at the level of fundamental particle physics, and how our...
MinutePhysics
Will Batteries Power The World? | The Limits Of Lithium-ion
Can Batteries Power Everything? This video is about the physical and chemical limitations to electrolytic batteries, and how we might surpass the energy density and specific energy of lithium-ion batteries (like the Panasonic 18650...
MinuteEarth
How to Make a Seashell - Just Add Water
Why do shell building living creatures live near the surface of the ocean? Learn how chemistry creates a dissolving depth for calcium and determines where shell builders can live.
SciShow
A Brief History of Life: When Life Exploded
Right at the beginning of the Paleozoic, there was a huge explosion of more complex life. And that’s when things started to get really interesting. This is our second installment on the history of life, but you can watch in any order you...
SciShow
Antarctic Lava to Pink Snow: The Science of Winter
"If you live in the northern hemisphere, there's a decent chance you're in a winter wonderland right now. Settle in with a hot drink for this winter compilation and learn about some of the interesting things that make winter wondrous!
SciShow
Hardcore Metal Stars
SciShow Space describes a new phenomenon that might be out there: Stars made entirely out of metal. But it's not quite what it sounds like!
SciShow
5 Times Evolution Should Have Planned Ahead
Natural selection can lead to some pretty amazing adaptations, but sometimes the resulting traits aren’t the most efficient solutions to the problems at hand. With the bar set to “good enough,” here are some features that arose from...
SciShow
How Engineers Are Turning Wind into Protein Powder
Alternative energy is great, but our infrastructure isn't exactly equipped to handle it. So scientists are coming up with other ways to use it, including turning it into food.
SciShow
Cloudy With A Chance Of Aliens: How We Look for Extraterrestrial Life
What do astronomers look for when they study exoplanets for signs of alien life? Hank explains how space telescopes are already yielding tantalizing clues of what other worlds might hold -- including water! -- and how the next generation...
Crash Course
White Dwarfs & Planetary Nebulae
Today Phil follows up last week’s look at the death of low mass stars with what comes next: a white dwarf. White dwarfs are incredibly hot and dense objects roughly the size of Earth. They also can form planetary nebulae: huge,...
SciShow
How Does Cold Medicine Work?
The cold medicine you picked up at the store involves some cool chemistry to treat your symptoms.
TED Talks
TED: How green hydrogen could end the fossil fuel era | Vaitea Cowan
As climate change accelerates, finding clean alternatives to fossil fuels is more urgent than ever. Social entrepreneur Vaitea Cowan believes green hydrogen is the answer. Watch as she shares her team's work mass producing electrolyzers...
TED Talks
Joseph DeSimone: What if 3D printing was 100x faster?
What we think of as 3D printing, says Joseph DeSimone, is really just 2D printing over and over ... slowly. Onstage at TED2015, he unveils a bold new technique -- inspired, yes, by Terminator 2 -- that's 25 to 100 times faster, and...
Crash Course
Life Begins Crash Course Big History 4
In which Hank and John Green teach you about life on Earth. They won't be giving advice on how life should be lived, because this is a history series. Instead, they'll teach you about the earliest forms of life on Earth, and some of the...
TED-Ed
TED-Ed: How epic solar winds make brilliant polar lights - Michael Molina
Why do we see those stunning lights in the northern- and southernmost portions of the night sky? The Aurora Borealis and Aurora Australis occur when high-energy particles are flung from the Sun's corona toward the Earth and mingle with...