SCIENCE
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Singularities inside black holes are truly unavoidable
Yes, “the laws of physics break down” at singularities. But relativity itself would have to be wrong for black holes…
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Is the USA on track to fulfill Astro2020’s decadal plan?
The Astro2020 decadal report set the USA’s agenda for space and ground-based astronomy. Here in 2026, we’re clearly on the…
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Ask Ethan: Why does our Universe require CP-violation?
Two discrete symmetries, charge conjugation and parity, must be violated together for our Universe to exist. We haven’t found enough…
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CERN to lead particle physics throughout the 21st century
CERN’s Large Hadron Collider superseded Fermilab’s TeVatron in 2008, but now nears the end of its run. The ambitious FCC…
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Ask Ethan: What do surveys of physicists actually reveal?
At and beyond the current frontiers of knowledge, many physicists have strongly held opinions. Can surveys point the way to…
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Why the tooth fairy is important for theoretical physics
Theoretical physics is notorious for wild ideas that seem, at first, to be nonsensical fantasies. That’s where the tooth fairy…
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Ask Ethan: Is the Universe the same age everywhere?
Today, in the here-and-now, a full 13.8 billion years have elapsed since the start of the hot Big Bang. But…
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What physics gets wrong about the idea of “fundamental”
In physics, we reduce things to their elementary, fundamental components, and build emergent things out of them. That’s not the…
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A brief history of the cosmic distance record
Only nearby objects appear to the naked eye. With telescopes of all types, especially in space, we’ve smashed those records…
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Ask Ethan: How empty are the depths of space?
There’s a lot of room in interplanetary, interstellar, and intergalactic space, but just how low the densities go is truly…
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