118 | Adam Riess on the Expansion of the Universe and a Crisis in Cosmology

118 | Adam Riess on the Expansion of the Universe and a Crisis in Cosmology

Astronomers rocked the cosmological world with the 1998 discovery that the universe is accelerating. Well-deserved Nobel Prizes were awarded to Saul Perlmutter, Brian Schmidt, and today's guest Adam Riess. Adam has continued to push forward on investigating the structure and evolution of the universe. He's been a leader in emphasizing a curious disagreement that threatens to grow into a crisis: incompatible values of the Hubble constant (expansion rate of the universe) obtained from the cosmic microwave background vs. direct measurements. We talk about where this "Hubble tension" comes from, and what it might mean for the universe.

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Adam Riess received his Ph.D. in astronomy from Harvard University. He is currently Bloomberg Distinguished Professor and Thomas J. Barber Professor of Physics and Astronomy at Johns Hopkins University and a Senior member of the Science Staff at the Space Telescope Science Institute. Among his many awards are the Helen B. Warner Prize of the American Astronomical Society, the Sackler Prize, the Shaw Prize, the Gruber Cosmology Prize, the MacArthur Fellowship, the Breakthrough Prize in Fundamental Physics, and the Nobel Prize.


Jaksot(415)

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AMA | December 2025

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338 | Ryan Patterson on the Physics of Neutrinos

338 | Ryan Patterson on the Physics of Neutrinos

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337 | Kevin Zollman on Game Theory, Signals, and Meaning

337 | Kevin Zollman on Game Theory, Signals, and Meaning

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336 | Anil Ananthaswamy on the Mathematics of Neural Nets and AI

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Machine learning using neural networks has led to a remarkable leap forward in artificial intelligence, and the technological and social ramifications have been discussed at great length. To understan...

24 Marras 20251h 14min

AMA | November 2025

AMA | November 2025

Welcome to the November 2025 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Pa...

17 Marras 20253h 34min

335 | Andrew Jaffe on Models, Probability, and the Universe

335 | Andrew Jaffe on Models, Probability, and the Universe

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10 Marras 20251h 17min

334 | Daniel Whiteson on the Physics of and by Aliens

334 | Daniel Whiteson on the Physics of and by Aliens

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