PBS
The Final Barrier to (Nearly) Infinite Energy
New ReviewThey say fusion is 50 years away, no matter when you ask. Then why are billions suddenly being pumped into fusion startups? Yes to train LLMs, but there's a reason the technobrats are bullish on fusion in particular. The fact is, the...
PBS
Is Our Model of Dark Energy Wrong?
New ReviewThe biggest news in cosmology in recent years is that the mysterious universe-accelerating entity we call dark energy may be fading away. The evidence for this is now strong enough that enormous effort is going into confirming this...
PBS
Is Gravity Random Not Quantum?
New ReviewThe holy grail of theoretical physics is to find the long-sought theory of quantum gravity. But what if this theory is as mythical as the grail of legend? What if gravity isn’t weirdly quantum at all, but rather … just a bit messy? Or...
PBS
How To Detect Faster Than Light Travel
New ReviewWarp drives may or may not be possible, but if they are then could a distant alien civilization’s warp fields produce gravitational waves that we could see here on Earth? According to a recent study.. Actually maybe, at least eventually....
PBS
What if Humans Are Not Earth's First Civilization? (Silurian Hypothesis)
New ReviewWe’re almost certainly the first technological civilization on Earth. But what if we’re not? We are. Although how sure are we, really? The Silurian hypothesis, which asks whether pre-human industrial civilizations might have existed.
PBS
Was the Gravitational Wave Background Finally Discovered?
New ReviewA few weeks ago a large team of gravitational wave astronomers announced something pretty wild. The moderately confident detection of pervasive ripples in the fabric of space time that presumably fills the cosmos, detected by watching...
PBS
How Asteroids Set the Stage for Life on Earth
New ReviewWe may have planet-shattering asteroids to thank for the origin of life on Earth.
Be Smart
What Could We See with a Planet-Sized Telescope?
New ReviewThe James Webb Telescope just took a photo of a newly discovered exoplanet. Exciting stuff but the raw image just looks like a small, faint dot—not a fully detailed world. The question is, just how big would a telescope need to be to...
Be Smart
Why Some of the Rainbow is Missing
New ReviewOver 200 years ago, scientists were looking at sunlight through a prism when they noticed that part of the rainbow was missing. There were dark lines where there should have been colors. Since then, scientists have unlocked the secrets...
Be Smart
Why NASA Punched an Asteroid
New ReviewWhere did life come from? It’s one of the biggest questions humans have ever asked — and the answer might be locked in ancient space rocks that were around before life began. To find out, NASA pulled off one of its most ambitious...
Be Smart
Space is Full of Junk. Here’s How to Clean It Up…
New ReviewWe know pollution is a problem on earth, but we’re filling space with our junk too. And if we don’t figure out a way to clean up space junk, we could end our interstellar dreams before they even get started. Today, we’re visiting some...
Be Smart
Measuring the Universe With a 14-Billion Light-Year Ruler
New ReviewSince the time of the ancient Greeks, scientists have been constructing a cosmic measuring tape to measure the universe from our own backyard all the way to its ever-expanding edge: the cosmic distance ladder. In this video, we climb...
Be Smart
When the CIA Spied on Planet Earth
New ReviewIn 1995, a few years after the collapse of the Soviet Union, a top-secret, first-of-its-kind US spy satellite program was declassified, leading to the unexpected story of how former enemies would become scientific allies, and technology...
SciShow
The Largest Object in the Universe Breaks the Laws of Physics
New ReviewIn March 2025, astronomers announced the "largest cosmic structure discovered to date". They called it Quipu. And Quipu is just the latest entry in a list of structures that are too big for cosmologists to explain without revisiting one...
SciShow
What Time Is It on the Moon?
New ReviewIf all goes well, we'll be sending astronauts back to the Moon in just a couple of years. And scientists have a lot to figure out before then, including the answer to a seemingly simple question: What time is it up there? Hosted by:...
SciShow
The Closest Black Hole Isn't as Far as You'd Like
New ReviewWhere is the closest black hole to Earth? Well, they're pretty hard to find, so the record-holder keeps getting updated. Currently, it's an unassuming black hole called Gaia BH1. But research has hinted at several black holes that might...
SciShow
The Top 10 Space Pictures of 2024 (and What They Mean)
New ReviewLet's say goodbye to 2024 by highlighting some amazing space images that were released this year. They aren't just pretty — astronomers can actually study them to learn more about the universe! Hosted by: Niba Audrey @NotesbyNiba (she/her)
SciShow
JWST Made a Cosmological Crisis Worse
New ReviewAstronomers have two main ways to calculate how fast the universe is expanding. Unfortunately, they don't agree with one another. The JWST was supposed to help solve this discrepancy, known as "The Hubble Tension" or "The Crisis in...
SciShow
No, Space Doesn’t Kill You Like That
New ReviewHollywood (and other fictional media) loves to show people dying in outer space. And it has several go-to causes of death, on a sliding scale of accuracy. But it turns out, reality has some ways to kill you that are far stranger than...
SciShow
NASA's Most Controversial Rock
New ReviewIn the mid-1990s, a meteorite with the unmemorable name ALH84001 became the most famous rock in the world. Because one team of scientists proposed that it had the evidence of real, if microscopic, Martians. Hosted by: Reid Reimers (he/him)
SciShow
The Moon That’s 2 Moons Stuck Together
New ReviewIn November 2023, NASA's Lucy spacecraft flew by the asteroid Dinkinesh and made a startling discovery: not only does this small asteroid have an even smaller companion (named Selam), that companion is shaped like a two-tier snowman....
SciShow
Should the Earth Even Have Water?
New Review"Water, water, every where"...or so that one poem goes. And it's kinda right, because there's way more water INSIDE the Earth than on the surface. But scientists still don't know with certainty exactly how Earth got all of that H2O....
SciShow
How Science Says You Should Pack
New ReviewPerfectly packing your suitcase for a trip may require more physics and math than you think. Here's when to crumple your clothes in the bag and shove it down, iron and fold everything, or roll it up using CleanTok hacks. Hosted by: Hank...
SciShow
The Brightest Object in the Universe is a Black Hole
New ReviewIn 2024, astronomers announced they'd discovered the brightest (or, technically, the most luminous) object in the known universe. And it's a cosmic engine powered by the hungriest black hole in the known universe. Hosted by: Stefan Chin...