The familiar terrain of solids, liquids, and gases gives way to the exotic realms of plasmas and degenerate matter.
In physics, we reduce things to their elementary, fundamental components, and build emergent things out of them. That's not the full story.
There is no such thing as a void in the Universe.
Gamma-ray bursts are so powerful they could vaporize the Earth from 200 light-years away. Recreating them in the lab is not easy.
If light can't be bent by electric or magnetic fields (and it can't), then how do the Zeeman and Stark effects split atomic energy levels?
In 1974, Hawking showed that black holes aren't stable, but emit radiation and decay. Nearly 50 years later, it isn't just for black holes.
The concept of ‘relativistic mass’ has been around almost as long as relativity has. But is it a reasonable way to make sense of things?
Plants at room temperature show properties we had only seen near absolute zero.
Particle physicists use gigantic accelerators to investigate the infinitesimal.
Across all wavelengths of light, the Sun is brighter than the Moon. Until we went to the highest energies and saw a gamma-ray surprise.
Einstein's most famous equation is E = mc², which describes the rest mass energy inherent to particles. But motion matters for energy, too.
We can reasonably say that we understand the history of the Universe within one-trillionth of a second after the Big Bang. That's not good enough.
Yes, "the laws of physics break down" at singularities. But something really weird must have happened for black holes to not possess them.
The problem of the electroweak horizon haunts the standard model of cosmology and beckons us to ask how deep a rethink the model may need.
Quantum uncertainty and wave-particle duality are big features of quantum physics. But without Pauli's rule, our Universe wouldn't exist.
The LHC has a long, productive life ahead of it. An upgraded version, called the “High Luminosity LHC,” will be available in 2028.
Cosmologists are largely still in the dark about the forces that drive the Universe.
If you look into a mirror, you'll notice that left-and-right are reversed, but up-and-down is preserved. The reason isn't what you think.
For decades, theorists have been cooking up "theories of everything" to explain our Universe. Are all of them completely off-track?
You are an energy field — but not the “chakras” or “auras” kind.
The double-slit experiment, hundreds of years after it was first performed, still holds the key mystery at the heart of quantum physics.