PBS
Why String Theory is Right
Some see string theory as the one great hope for a theory of everything - that it will unite quantum mechanics and gravity and so unify all of physics into one glorious theory.
PBS
Quantum Gravity and the Hardest Problem in Physics
Between them, general relativity and quantum mechanics seem to describe all of observable reality.
PBS
Anti-gravity and the True Nature of Dark Energy
We've come a long way in our understanding of dark energy. In previous episodes we've looked at how our universe is paradoxically flat and how dark energy is exponentially accelerating the expansion of the universe. Now, let's dive into...
PBS
Noether's Theorem and The Symmetries of Reality
Conservation laws are among the most important tools in physics. They feel as fundamental as you can get. And yet they're wrong - or at least they're only right sometimes. These laws are consequences of a much deeper, more fundamental...
PBS
Hawking Radiation
It's the most famous prediction of perhaps the most famous genius of our time ... Stephen Hawking's theory of Hawking Radiation.
PBS
How to Build a Blackhole
Black holes have mystified physicists for decades, but with the help of quantum mechanics, we are beginning to make serious progress in understanding these strange objects. This week on Space Time, Matt dives deeper into the physical...
SciShow
4 of Physics’ (Other) Greatest Mysteries
Physicists are interested in the big questions like "Where did we come from?" and "What is all this stuff?". But the answers to some of these questions, just lead to more questions.
PBS
The Black Hole Information Paradox
Black holes are the result of absolute gravitational collapse of a massive body: a point of hypothetical infinite density surrounded by an event horizon. At that horizon time is frozen and the fabric of space itself cascades inwards at...
PBS
The Black Hole Entropy Enigma
Black Holes should have no entropy, but they in fact hold most of the entropy in the universe. Let's figure this out.
SciShow
How Two Dead Stars Sparked a New Field of Astronomy
Pulsars are more than just cool blinking lights shining across the universe. The discovery of the first binary pulsar paved the way for gravitational wave astronomy astronomy today.
PBS
Is The Alcubierre Warp Drive Possible?
Inspired by Gene Roddenberry's Star Trek, physicist Miguel Alcubierre set out to transform one of the cornerstones of science fiction iconography, the Warp Drive, into reality. But is it even possible? Can we "warp" the fabric of reality...
SciShow
The Sorry State of Dark Matter Alternatives
Scientists can’t directly observe dark matter, and they still don’t know what it is… so why are they so confident it exists?
PBS
How to Detect Extra Dimensions
On this Space Time Journal Club we look at how gravitational waves can be used to search for extra dimensions of space!
PBS
White Holes
Lurking in the depths of the mathematics of Einstein's general relativity is an object even stranger than the mysterious black hole. In fact it's the black hole's mirror twin, the white hole. Some even think that these could be the...
SciShow
3 Great Minds We Lost in 2018
We welcomed new science and discoveries in 2018, but unfortunately, we also had to say goodbye to some important figures in the scientific community.
SciShow
5 of the Best Measurements In Science
Proving something right isn’t just about quantity. It’s also about quality and over the years, scientists have made measurements proving that we understand ridiculously well how the universe works.
PBS
Does Dark Matter BREAK Physics?
In this episode, welcome in Matt O'Dowd as the new host to rigorously take you through the mysteries of space, time, and the nature of reality. We're starting off this new season with perhaps one of the most mysterious things of all -...
PBS
What's Wrong With the Big Bang Theory?
Let's look further into what we don't yet know about the Big Bang, and how the theory could progress in the future. Since there is a discrepancy between general relativity and quantum mechanics, we continue to search for a grand unifying...
TED Talks
Tim Harford: A powerful way to unleash your natural creativity
What can we learn from the world's most enduringly creative people? They "slow-motion multitask," actively juggling multiple projects and moving between topics as the mood strikes -- without feeling hurried. Author Tim Harford shares how...
SciShow
Dark Energy Camera
Hank brings us news of the most sensitive digital camera in the universe, poised to help astronomers explain the mystery of why the universe is speeding up instead of slowing down as Einstein's theory of General Relativity would predict.
SciShow
Celebrating Stephen Hawking’s Most Famous Discoveries
Last week we lost legendary scientist Stephen Hawking. To honor of one of the greatest legacies in cosmology, we wanted to celebrate and unpack some of his most famous findings.
SciShow
The Sun's Center Is 39,000 Years Younger Than Its Surface
In the early 1960s, Richard Feynman was quoted as saying that Earth's center should be a day or two younger than its surface. 50 years later, scientists re-did the math.
PBS
Have Gravitational Waves Been Discovered?!?
For the past 90 years, the predictions laid out Einstein's general theory of relativity have continued to be confirmed by experimental science. The last hold out is gravitational waves - the idea that certain gravitational events cause...
SciShow
Why Scientists Keep Trying to Break This 18th Century Law
It’s usually not a great idea to break laws, but breaking the laws of science is an exception! In fact, it’s often how we make progress.