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Particles of Thought
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Space-Time Expansion, Explained | Adam Riess

2 min•4 mars 2026

If the universe is expanding, why aren’t galaxies stretching apart? Cosmologist Adam Riess breaks down the physics behind cosmic expansion, the forces that resist it, and why dark energy dominates the vast spaces between.

For more, check out the extended interview with Adam Riess.

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How Close Can You Safely Get to a Black Hole? | Janna Levin
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A New Law of Nature? | Robert Hazen & Michael Wong
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AI Is Coming for Blue Collar Jobs | Hany Farid
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What Species Can We De-Extinct? | Beth Shapiro
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Were Dinosaurs Able to Sing? | Erich Jarvis
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Your Brain’s Peak Performance Mode | Heather Berlin
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