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Universe Expansion
2023 is an exciting time for the study of quark-gluon plasmas.
If there are three neutrino species, all with different masses, then how is energy conserved when they oscillate from one flavor to another?
Everything everywhere all at once.
How scientists found out that we live in a cosmic aquarium.
When supermassive black holes merge, they emit more energy than anything else to occur in our Universe except the Big Bang.
We can't go back to the Big Bang, nor ahead to the heat death of the Universe. Nevertheless, here are today's natural temperature extremes.
Somewhere out there in the Universe is the heaviest neutron star, and elsewhere lies the lightest black hole. Where's the line between them?
Two very different ideas, wormholes and quantum entanglement, might be fundamentally related. What would "ER = EPR" mean for our Universe?
Not even Einstein immediately knew the power of the equations he gave us.
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.
If stars don't go supernova at first, they can get a second chance after becoming a white dwarf. But can their companions survive?
The road to intelligent life is a series of hard steps.
Unless you confront your theory with what's actually out there in the Universe, you're playing in the sandbox, not engaging in science.
JWST's revolutionary views arrive in high-resolution at infrared wavelengths. Without NASA's Spitzer first, it wouldn't have been possible.
The Fermi paradox (along with the subsequent Drake equation) is so difficult that even brilliant thinkers can make little dent in it.
Dark energy is one of the biggest mysteries in all the Universe. Is there some way to avoid "having to live with it?"
Protons and neutrons are held together by the strong force: with 3 colors and 3 anticolors. So why are there only 8 gluons, and not 9?
Nobel Laureate Roger Penrose, famed for his work on black holes, claims we've seen evidence from a prior Universe. Only, we haven't.
An incredible composite image of Pandora's Cluster, Abell 2744, simultaneously showcases both our impressive knowledge and vast ignorance.
The glorious sights that JWST keeps revealing are less than a millionth of the whole Universe. Just imagine what else is out there.
Since its observation discovery in the 1990s, dark energy has been one of science's biggest mysteries. Could black holes be the cause?
When you combine the Uncertainty Principle with Einstein's famous equation, you get a mind-blowing result: Particles can come from nothing.
Are quantum fields real, or are they simply calculational tools? These 3 experiments show that if energy is real, so are quantum fields.
From the Big Bang to dark energy, knowledge of the cosmos has sped up in the past century — but big questions linger.
It is a story with nebulous beginnings and no discernible end.
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!
From the earliest stages of the hot Big Bang (and even before) to our dark energy-dominated present, how and when did the Universe grow up?