Physics

Even if you aren't in the path of totality, you can still use the solar eclipse to measure how long it takes the Moon to orbit Earth.
quantum gravity
Physicists just can't leave an incomplete theory alone; they try to repair it. When nature is kind, it can lead to a major breakthrough.
parity mirror universe
Symmetries aren't just about folding or rotating a piece of paper, but have a profound array of applications when it comes to physics.
A diagram illustrating the earth's orbit around the sun with positions indicating seasonal change, including facts about leap day.
Leap day only comes once every four years, including in 2024. But the reason we have it, including when we do and don't, may surprise you.
An image of a yellow and purple wave with an unclear origin.
Everything acts like a wave while it propagates, but behaves like a particle whenever it interacts. The origins of this duality go way back.
nasa merge black hole
So far, gravitational waves have revealed stellar mass black holes and neutron stars, plus a cosmic background. So much more is coming.
gaia ESA milky way
For thousands of years, humanity had no idea how far away the stars were. In the 1600s, Newton, Huygens, and Hooke all claimed to get there.
Einstein field equations
Although many of Einstein's papers revolutionized physics, there's one Einsteinian advance, generally, that towers over all the rest.
A black and white image of a large circular object.
Recent measurements of CERN data seem to disagree with standard-model predictions about how the Higgs boson decays, though further analysis is needed to confirm the observations.
A bright light in the sky.
As planets with too many volatiles and too little mass orbit their parent stars, their atmospheres photoevaporate, spelling doom for some.
A tunnel is being constructed in a tunnel.
The DUNE project will beam tiny neutrinos across vast distances. But the first step involved moving a heavier material: 1 million tons of rock.
Two men sit closely together, one smiling and the other reclining with a relaxed posture against a dark background.
6mins
Science writer George Musser on the unsung role of friendship in science’s biggest discoveries.
A black background with blue bubbles on it.
Explore how QBism reframes science by placing the observer at the heart of quantum reality.
A diagram showing the earth and tpaper folding to the moon.
Each time you fold a piece of paper, you double the paper's thickness. It doesn't take all that long to even reach the Moon.
overview effect
Figuring out the answer involved a prism, a pail of water, and a 50 year effort by the most famous father-son astronomer duo ever.
fusion power
In our Universe, matter is made of particles, while antimatter is made of antiparticles. But sometimes, the physical lines get real blurry.
Two men smiling in front of a white board.
It’s not just fun: DNA origami has the potential to revolutionize engineering at the nanoscopic scale.
An visualization of dark matter across the universe
The paper does not prove the existence of dark matter, but it mostly eliminates a rival theory called Modified Newtonian Dynamics.
An image of a black hole in the middle of a grid.
Roger Babson wanted a “partial insulator, reflector, or absorber of gravity” — something, anything, that would stop or dampen it.
An image of a nebula surrounded by stars, fine-tuned for life within its cosmic expanse.
Two of the answers add a dimension to physics that doesn’t belong there. Maybe we could call it "astrotheology."
sun vs hd 12545 sunspot starspot temperature
When we look at our Sun, its properties are incredibly constant, varying by merely ~0.1% over time. But all stars don't play by those rules.
A man is working on a machine in a lab, using laser technology to apply precise pressure.
Light can be turned into heat, which can then be turned into motion, and the effect of that motion can be turned into a big squeeze.
colliding black holes
All matter particles can act as waves, and massless light waves show particle-like behavior. Can gravitational waves also be particle-like?
A photo of a group of men with different colored circles on their heads.
The combined intellectual heft of multiple “big thinkers” delivered arguably the most successful scientific theory in history.
LIGO squeezed light
There's a quantum limit to how precisely anything can be measured. By squeezing light, LIGO has now surpassed all previous limitations.
entropy 2 stroke engine
The second law of thermodynamics is an inviolable law of reality. Here's what everyone should know about closed, open, and isolated systems.
A blue circle with bokeh lights around it.
From ancient Greek cosmology to today's mysteries of dark matter and dark energy, explore the relentless quest to understand the Universe's invisible forces.
The muon particle infographic fermilab
From unexplained tracks in a balloon-borne experiment to cosmic rays on Earth, the unstable muon was particle physics' biggest surprise.
particle collision
2023's Nobel Prize was awarded for studying physics on tiny, attosecond-level timescales. Too bad that particle physics happens even faster.