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Arguments against dark matter in the Bullet Cluster fall apart
Arguments against dark matter in the Bullet Cluster fall apart
The Bullet Cluster has, for nearly 20 years, been hailed as an empirical “proof” of dark matter. Can their detractors explain it away?
Ethan Siegel
Jul 16
Why humanity is a cosmic tale of despair and hope
Why humanity is a cosmic tale of despair and hope
On a cosmic scale, our existence seems insignificant and inconsequential. But from another perspective, humans are completely remarkable.
Ethan Siegel
Jul 15
Ask Ethan: Is it all-or-nothing for the expanding Universe?
Ask Ethan: Is it all-or-nothing for the expanding Universe?
On the largest of cosmic scales, the Universe is expanding. But it isn’t all-or-nothing everywhere, as “collapse” is also part of the…
Ethan Siegel
Jul 12
Starts With A Bang podcast #107 — Binary stars and modified gravity
Starts With A Bang podcast #107 — Binary stars and modified gravity
The standard picture of our Universe is that it’s dominated by dark matter and dark energy. But this alternative is also worth considering.
Ethan Siegel
Jul 12
The quantum physics behind fireworks displays
The quantum physics behind fireworks displays
From the explosions themselves to their unique and vibrant colors, the fireworks displays we adore require quantum physics.
Ethan Siegel
Jul 11
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