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Why doesn’t the expanding Universe break the speed of light?
Why doesn’t the expanding Universe break the speed of light?
Just 13.8 billion years after the hot Big Bang, we can see objects up to 46.1 billion light-years away. No, this doesn’t violate…
Ethan Siegel
Jul 18
Strongest “missing link” in black hole physics discovered at last
Strongest “missing link” in black hole physics discovered at last
We know of stellar mass and supermassive black holes, but intermediate mass ones have long proved elusive. Until now.
Ethan Siegel
Jul 17
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
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