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Space
The zero-point energy of empty space is not zero. Even with all the physics we know, we have no idea how to calculate what it ought to be.
What kind of object will you form? What will its fate be? How long will a star live? Almost everything is determined by mass alone.
In our Solar System, even the two brightest planets frequently align in our skies. But only rarely is it spectacularly visible from Earth.
Nobel Laureate Roger Penrose, famed for his work on black holes, claims we've seen evidence from a prior Universe. Only, we haven't.
We may have discovered alien life already but rejected the evidence too quickly because it seemed false at first glance.
Generations ago, cosmologists asserted that the Universe might not just be the same in all directions, but at all times. But is that true?
A fascinating 90 minute podcast between Dr. Ivanna Escala and Ethan Siegel on Starts With A Bang!
19 years ago, the Bullet Cluster provided an empirical proof for dark matter. Even today, modified gravity still can't explain it.
In general relativity, white holes are just as mathematically plausible as black holes. Black holes are real; what about white holes?
Air currents in our atmosphere limit the resolving power of giant telescopes, but computers and artificial stars can sharpen the blur.
3mins
Left–Right, Back–Forth, Up–Down. What’s the fourth dimension?
Along with gravitational lensing and ALMA's incredible long-wavelength spectroscopy, JWST is reshaping our view of the early Universe.
Size matters, but it's not the only thing.
In Einstein's relativity and the Standard Model, we only have three spatial dimensions. But there could be more, and many think there are.
Humanity's newest, most powerful space telescope is performing even better than predicted. The reason why is unprecedented.
If life is common in the Universe, then where is everybody? Known as the Fermi Paradox, a new project may help solve the riddle.
Most globular clusters appear to form their stars all at once, but there are exceptions. JWST just observed how "second formations" happen.
Here on Earth, the Sun is our primary source of light, heat, and energy. But it also poses a grave threat to human civilization.
On Earth, microbial growth is common in lava tubes no matter the location and climate, whether it’s ice-volcano interactions in Iceland or hot, sand-floored lava tubes in Saudi Arabia.
Though a single measurement is not enough to definitively decide the debate, this is a major win for dark matter proponents.
Quantum mechanics has taught us that even empty space contains energy. "Negative energy" is the state of having less energy than empty space.
In the grand scheme of the cosmic story, a single year isn't all that significant. But over time, the annual changes really add up!
Ever since the Big Bang, cataclysmic events have released enormous amounts of energy. Here's the greatest one ever witnessed.
You can lead an overconfident chatbot to expert knowledge, but can it actually learn and assimilate new information?
As far as we know, it's only happened once to one unlucky person in Oklahoma.
Dead whales inspire a way to find extraterrestrial life on Mars.
7mins
What astronaut Ron Garan saw in space changed his life forever – here’s what it taught him.
Perhaps wormholes will no longer be relegated to the realm of science fiction.