SciShow
Don’t Look At the Sun! …Unless | Compilation
It’s common knowledge that you should never look directly at the sun. But, like, what about during an eclipse? Surely you can look then?
SciShow
How to Make a Dark Matter Planet
Dark Matter is the most abundant form of matter in the known universe, so what's keeping it from forming into planets?
SciShow
A Big Bang Beginner’s Guide | Compilation
While there's still a lot that astrophysicists don't know about the Big Bang, there are some things we do know. So today, let's get caught up on the Big Bang basics.
SciShow
Life on an 8-Hour Planet
Even if we find an earth-sized exoplanet, how can we be so sure that we're looking at earth 2.0? It might come down to how fast it's spinning.
SciShow
How Blocking the Sun Makes Mars Hotter
If we’re going to send people to Mars someday, we’re going to need to be very conscious of the challenges presented in this endeavor. And at the top of that list is the ferocious nature of dust on the barren planet.
SciShow
Did Earth's Continents Come from Space?
Earth didn't always have the land beneath your feet, but what might have caused it to form is a bit of a mystery.
SciShow
The Snail We Misidentified More Than 100 Times
Everyone makes mistakes, but misidentifying a species more than 100 times? It happened. In this List Show, we tell the tale of the periwinkle snail and other creatures scientists confused for someone else.
SciShow
How Many Suns Can One Planet Have?
Earth and the other seven planets in our solar system have only one star: the Sun. Years ago, astronomers found the first exoplanet that had two stars. They also found one with three stars. And four. Just how many stars can one planet have?
SciShow
The Spiders That Turn Stars into Planets
Neutron stars, are some of the most extreme phenomenon in the universe. It's doubly so for a subset known as pulsars. Some are spinning so fast, and are so massive, that astronomers aren't entirely sure how they got to be that way. One...
PBS
What If Physics IS NOT Describing Reality?
Neils Bohr said, “It is wrong to think that the task of physics is to find out how Nature is. Physics concerns what we can say about Nature.” Well it turns out that if we pay attention to this subtle difference, some of the most...
PBS
Cosmic Microwave Background Challenge | Space Time | PBS Digital Studios
If a photon leaves the train station shortly after the Big Bang ...
PBS
Could We Terraform Mars?
We already have the technology to bring humans safely to Mars and set up small settlements - or at least could do within a generation. But those settlements will need to be cocooned - shielded against the deadly cold, intense radiation,...
PBS
Planck's Constant and The Origin of Quantum Mechanics | Space Time | PBS Digital Studios
Planck's Length is the length below which the concept of length loses its meaning. What exactly does that mean and what are the incredible implications this fact has upon our reality? To find out check out this episode of Space Time...
PBS
Planet X Discovered?? + Challenge Winners!
Some funky orbits near the Kuiper Belt are hinting towards a brand new planet, the elusive ‘Planet X.’ Our friends Mike Brown and Konstantin Batygin of Caltech are working hard to finally spot the potential gas giant through powerful...
PBS
How Plankton Created A Bizarre Giant of the Seas
At more than 2 meters long, Aegirocassis was not only the biggest radiodont ever, but it also may have been the biggest animal in the Early Ordovician. This bizarre marine giant may have only been possible, thanks to a major revolution...
PBS
How Ankylosaurs Got Their Clubs
While clubs are practically synonymous with ankylosaurs, we’ve only started to get to the bottom of how they worked and how this unusual anatomy developed in the first place.
PBS
Did An Ancient Pathogen Reshape Our Cells?
There is one - and only one - group of mammals that doesn’t have alpha-gal: the catarrhine primates, which are the monkeys of Africa and Asia, the apes, and us.
PBS
How Our Deadliest Parasite Turned To The Dark Side
Around 10,000 years ago, somewhere in Africa, a microscopic parasite made a huge leap. With a little help from a mosquito, it left its animal host - probably a gorilla - and found its way to a new host: us.
PBS
How Did Our Most Famous Ancestor Really Die?
Did our most famous fossil ancestor, Lucy, die by falling out of a tall tree? The answer is part of a decades-long debate over how, exactly, our ancestors transitioned from life in the trees to life on the ground.
PBS
Did Eating Insects Shrink These Dinos?
We often think of dinosaurs as either preying on other dinos or mammals, or as plant-eaters -- but in ecosystems today, those aren’t the only two options. So why would we expect dinosaurs to have only been carnivores or herbivores, with...
PBS
Why Do You Remember The Past But Not The Future?
The laws of physics don’t specify an arrow of time - they don’t distinguish the past from the future. The equations we use to describe how things evolve forward in time also perfectly describe their evolution backwards in time. So the...
PBS
Can Free Will be Saved in a Deterministic Universe?
Physicists have a long history of sticking our noses where they don’t belong - and one of our favorite places to step beyond our expertise is the question of consciousness and free will. Sometimes our musings are insightful, sometimes...
PBS
How To Detect a Neutrino
Why is there something rather than nothing? Well the answer may be found in the weakest particle in the universe: the neutrino. For over half a century Fermilab has been the premier particle accelerator facility of the United States and...
PBS
Are We Running Out of Space Above Earth?
While recent news about the Chinese Long March 5 Rocket made a lot of people very nervous because a 22-ton rocket was going to fall out of the sky, this sort of thing happens all the time. Boosters, dead satellites, and sometimes even...