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Does the Universe expand by stretching or creating space?
Does the Universe expand by stretching or creating space?
The evidence that the Universe is expanding is overwhelming. But how? By stretching the existing space, or by creating new space itself?
Ethan Siegel
May 16
Our best idea for the “origin of gold” doesn’t add up
Our best idea for the “origin of gold” doesn’t add up
In 2017, we detected gold being forged in a neutron star-neutron star merger. Now, in 2024, the amounts created simply don’t add up.
Ethan Siegel
May 15
New particle at last! Physicists detect the first “glueball”
New particle at last! Physicists detect the first “glueball”
Glueballs are an unusual, unconfirmed Standard Model prediction, suggesting bound states of gluons alone exist. We just found our first…
Ethan Siegel
May 14
JWST uncovers new secrets within the Horsehead Nebula
JWST uncovers new secrets within the Horsehead Nebula
The most iconic “dark nebula” of all lights up under JWST’s infrared gaze. Here’s what’s newly discovered inside.
Ethan Siegel
May 13
The big idea that our Universe is a hologram
The big idea that our Universe is a hologram
Holograms preserve all of an object’s 3D information, but on a 2D surface. Could the holographic Universe idea lead us to higher…
Ethan Siegel
May 10
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