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Ask Ethan: Should we stop worrying about vacuum decay?
Vacuum decay is one of the most frightening, and undetectable-until-it-happens, possibilities for how this will all end.
But if we learn enough, there could be a way to stop it.
Our Universe has a positive, non-zero value to the energy within empty space. Can we potentially save ourselves by considering vacuum decay?
Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.
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4 myths cause us to abandon science. Here’s the path back.
Four myths about how "science is flawed" cause people to choose conspiratorial thinking instead.
That's the path to fraud, grift, and misinformation.
Here's the way back.
It’s not a gambit. It’s not fraud. It’s not driven by opinion, prejudice or bias. It's not unchallengeable. And it's more than facts alone.
2026’s Perseids, lousy this July, will peak at the perfect time
The Perseids have begun here on Earth, but conditions are lousy for it right now.
On the night of the peak, however, conditions will be just about ideal.
Here's how to best see them.
Although the Geminids have rivaled the Perseids recently, in 2026, the Perseids should win at their peak. Here's why, plus how to see them.
A cosmic first: separated sibling stars reunited by supernovae
We've never witnessed a pair of massive, binary stars both go supernova before.
Opposite the galactic center, we just might have spotted the ultimate family reunion: in death.
We've never witnessed a system of binary stars both go supernova before. A once-hidden source of gamma rays just revealed the first one.
Sugar in space: another step towards life’s origins
With the discovery of our first sugar, the four-carbon molecule erythrulose, in an interstellar gas cloud, the raw ingredients for life are more abundant than ever.
One big step to go!
In a gas cloud 26,000 light-years away, a 4-carbon sugar, erythrulose, has just been found. Here's what it means for life in the Milky Way.
Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.
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Ask Ethan: Does Mars’s gravity prohibit human colonization?
Human bodies decay in the microgravity environment of interplanetary space, but recover on planet Earth.
The low gravity of Mars will be a challenge, but maybe not a dealbreaker.
Mars is very different than Earth: smaller, drier, colder, etc. But the biggest long-term challenge, for human colonies, is its low gravity.
The physical Universe isn’t made of pure mathematics alone
Mathematics is great, as a tool, for describing the Universe.
But our Universe isn't made of pure mathematics alone.
To transform it into physics, something more is required.
Mathematics is our language for quantitatively describing reality, but it can also take us to worlds that never were. Physics needs more.
The big reason Einstein would never have used AI
The point of school is to grow your mind; the point of science is to discover truths about reality.
We know that Einstein never would've used AI.
Here are the dangers if you do.
Many think that intelligence can be outsourced to AI. Einstein wouldn't have used it. If he had, he never would have become Einstein.
99% of a core-collapse supernova’s energy is invisible
Despite how luminous core-collapse supernovae are, 99% of the energy they carry away is invisible: in the form of neutrinos.
Here's why that must be the case.
Despite the brilliance of these cosmic beacons, only 1% of a core-collapse supernova's energy is observable. The other 99% is in neutrinos.
Big evidence for “second generation” black hole mergers
With 390 gravitational wave events under our belts, we can actually see a difference between spin-orbit aligned and non-aligned mergers.
The switch is at 40-45 solar masses.
With nearly 400 black hole events from gravitational waves, we can begin to infer their origins. At least two different populations emerge.
Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.
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Starts With A Bang podcast #131 – The baryon life cycle
The Universe was born with just hydrogen and helium for atoms: insufficient for making complex molecules, rocky planets, and life.
So how did we get from there to here?
The history of atoms in the Universe is our own history: without them, there would be no us. So how do we piece their cosmic story together?
Ask Ethan: What sets the size of the observable Universe?
We know how big the observable Universe is, was, and will be: not just today, but far into the past and future as well.
Here's what sets the "actual size" of our cosmos.
For all we know, the cosmos could truly be infinite in scale. But the observable part of our Universe? It's finite, and its size is known.
America pioneered gravitational wave research. Now it may leave it behind.
The USA has led the way in detecting gravitational waves here in the 21st century.
The ongoing threat is that we'll abandon it, as we've done with so much science already.
The LIGO facilities in the U.S. are the most sensitive gravitational wave detectors in the world. Their future remains uncertain.
Forget seeing the Universe’s beginning. It’s already been erased
The Big Bang gave us our cosmic origin story, and inflation took us back even before that, to an earlier stage.
So where did inflation come from?
That information's all been erased!
We used to think the Big Bang started it all. Then we realized that something else came before it, erasing everything that existed prior.
Why the “smallest” giant telescope may be the world’s best
At only 25 meters across, the GMT pales in size next to the 39 meter ELT for next-gen flagship telescopes.
Yet due to some brilliant decisions, GMT science, overall, looks better.
Get on board!
At "only" 25 meters in diameter, the Giant Magellan Telescope is the smallest of three current projects. That might make all the difference.
Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.
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Famous study in error: the Universe isn’t anisotropic
Just two weeks ago, a bold claim was made: that DESI data reveals an anisotropic Universe, on larger scales than should be possible.
It's not possible; these errors explain why.
Using the newest large-scale structure data, a team of researchers announced an unexpected anisotropy on cosmic scales. Too bad it's wrong.
What has more power: Earth’s aurorae or fireworks shows?
Sure, the USA may have broken the record for most fireworks at a single fireworks show.
But can the power in all of our fireworks compete with the power in Earth's aurorae?
Over 800,000 fireworks explode in under and hour in the world's largest fireworks shows. How do natural auroral displays compare in energy?