TED-Ed
TED-Ed: The wild sex lives of marine creatures | Luka Seamus Wright
On a reef in the Pacific Ocean, 17,000 camouflage groupers dart about in the cloudy water. It is, in fact, an underwater orgy— turned feeding frenzy. An orgy might seem like a rather flamboyant way to breed, but sex in the sea is a...
SciShow
How Many Galaxies Are There?
We've been trying to count the galaxies in the universe since the mid '90s, but our estimates change as our tools improve. So what does our current estimate really mean?
SciShow
What This Video Will Do to Your Friends' Brains
The way your brain reacts to stimuli might tell us more about who you're friends with, and swatting at mosquitoes might one day bring us positive results.
SciShow
The Oldest Star in the Universe
Hank tells the story of the mysterious star known as "Methuseleh," and why scientists think that it is the oldest known star in the universe.
SciShow
Can You Burn Metal?
You know metal can get really hot, and you probably know that it can melt. But can it burn? Hank shows you how you can burn a hunk of metal like you're some kinda superhero (just be careful, please), and he explains how, in chemistry,...
SciShow
Could We Give Mars a Magnetic Field?
One way to help us live on Mars would be to terraform the planet. Some scientists think we might be able to do that by giving it a new magnetic field!
TED-Ed
TED-Ed: History vs. Sigmund Freud - Todd Dufresne
Working in Vienna at the turn of the 20th century, he began his career as a neurologist before pioneering the discipline of psychoanalysis, and his influence towers above that of all other psychologists in the public eye. But was Sigmund...
SciShow
Abilities Evolution Took From Us
A common misconception is that evolution is a long chain of progress, where organisms gain cool, new features over time. However, if a trait doesn't help with survival or reproduction, eventually it can disappear. Here are a few...
Crash Course
Reproductive System, part 2 - Male Reproductive System: Crash Course A&P 41
Our month-long exploration of human reproduction continues with a look at testicular anatomy, the steps of sperm production, and how it's influenced by gonadotropin and testosterone. Hank also explains how sperm mature, and how they...
SciShow
What's Stopping the James Webb Space Telescope?
The James Webb Space Telescope is the most complex telescope we’ve ever sent into space. But, Webb is not, in fact, in space… yet.
TED-Ed
TED-Ed: Is time travel possible? - Colin Stuart
Time travel is a staple of science fiction stories, but is it actually possible? It turns out nature does allow a way of bending time, an exciting possibility suggested by Albert Einstein when he discovered special relativity over one...
PBS
Splitting Rent with Triangles
You can find out how to fairly divide rent between three different people even when you don't know the third person's preferences! Find out how with Sperner's Lemma.
Crash Course
Personal Identity: Crash Course Philosophy
Today Hank is building on last week’s exploration of identity to focus on personal identity. Does it in reside in your body? Is it in the collective memories of your consciousness? There are, of course, strengths and weaknesses to both...
SciShow
How Antarctica Froze Over
Antarctica wasn't always covered in kilometer thick ice sheets, in fact, scientists have spent years figuring out what turned this once lush continent into its current icy state.
TED-Ed
TED-Ed: How is power divided in the United States government? - Belinda Stutzman
Articles I-III of the United States Constitution allow for three separate branches of government (legislative, executive, and judicial), along with a system of checks and balances should any branch get too powerful. Belinda Stutzman...
TED Talks
TED: The most powerful yet overlooked resource in schools | Heejae Lim
When teachers and families work together, everyone wins, says education technology entrepreneur and TED Fellow Heejae Lim. She shines a light on an underutilized resource in US public education -- a family's love for their children --...
TED Talks
TED: What can save the rainforest? Your used cell phone | Topher White
The sounds of the rainforest include: the chirps of birds, the buzz of cicadas, the banter of gibbons. But in the background is the almost-always present sound of a chainsaw, from illegal loggers. Engineer Topher White shares a simple,...
3Blue1Brown
But why is a sphere's surface area four times its shadow?
Two proofs for the surface area of a sphere
SciShow
Why Psychology Tells Us What We Already Know
Hindsight bias skews our interpretation of events and information, making it seem like they were predictable or just not that surprising. This bias can cause some real problems, but the good news is, once you are aware of it, there are...
SciShow
This Tank of Water Could Change Physics Forever
No one has ever conclusively seen a proton turn into other, lighter particles, but fifty million liters of water in Japan might change that and our ideas about subatomic particles forever.
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.
SciShow
There Are Millions of Blood Types
You’re probably aware that your blood can be A, B, AB or O, but it turns out that blood types can get a lot more complicated than that!
TED-Ed
TED-Ed: A brief history of numerical systems - Alessandra King
1, 2, 3, 4, 5, 6, 7, 8, 9 and 0. With just these ten symbols, we can write any rational number imaginable. But why these particular symbols? Why ten of them? And why do we arrange them the way we do? Alessandra King gives a brief history...