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Inflation and dark matter are not like string theory
Inflation and dark matter are not like string theory
Inflation, dark matter, and string theory are all proposed extensions to the prior consensus picture. But what does the evidence say?
Ethan Siegel
Sep 11
The one cosmic secret that demands a new particle collider
The one cosmic secret that demands a new particle collider
The observation that everything we know is made out of matter and not antimatter is one of nature’s greatest puzzles. Will we ever solve…
Ethan Siegel
Sep 10
Ask Ethan: Why are inertial and gravitational mass equivalent?
Ask Ethan: Why are inertial and gravitational mass equivalent?
The mass that gravitates and the mass that resists motion are, somehow, the same mass. But even Einstein didn’t know why this is so.
Ethan Siegel
Sep 6
What do unexpected experimental results actually tell us?
What do unexpected experimental results actually tell us?
Scientific surprises, driven by experiment, are often how science advances. But more often than not, they’re just bad science.
Ethan Siegel
Sep 5
Official verdict: JWST’s early galaxies didn’t break cosmology
Official verdict: JWST’s early galaxies didn’t break cosmology
The “little red dots” were touted as being too massive, too early, for cosmology to explain. With new knowledge, everything adds up.
Ethan Siegel
Sep 4
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