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(420)

312 | Thomas Levenson on the Mutual History of Humans and Germs

312 | Thomas Levenson on the Mutual History of Humans and Germs

The germ theory of disease is a crowning achievement of science, up there with modern physics, continental drift, and evolution via natural selection. (Even if there will always be cranky skeptics.) B...

21 Huhti 20251h 31min

311 | Annaka Harris on Whether Consciousness is Fundamental

311 | Annaka Harris on Whether Consciousness is Fundamental

Questions about consciousness range from the precise and empirical -- what neurons fire when I have some particular experience -- to the deeply profound -- does consciousness emerge from matter, or do...

14 Huhti 20251h 10min

AMA | April 2025

AMA | April 2025

Welcome to the April 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 Patre...

7 Huhti 20253h 30min

310 | Marc Kamionkowski on Dark Energy and Cosmic Anomalies

310 | Marc Kamionkowski on Dark Energy and Cosmic Anomalies

Cosmologists were, let us be honest, pretty stunned in 1998 when observations revealed that the universe is accelerating. There was an obvious plausible explanation, the cosmological constant proposed...

31 Maalis 20251h 26min

309 | Christof Koch on Consciousness and Integrated Information

309 | Christof Koch on Consciousness and Integrated Information

Consciousness is easier to possess than to define. One thing we can do is to look into the brain and see what lights up when conscious awareness is taking place. A complete understanding of this would...

24 Maalis 20251h 20min

308 | Alison Gopnik on Children, AI, and Modes of Thinking

308 | Alison Gopnik on Children, AI, and Modes of Thinking

We often study cognition in other species, in part to learn about modes of thinking that are different from our own. Today's guest, psychologist/philosopher Alison Gopnik, argues that we needn't look ...

17 Maalis 20251h 9min

AMA | March 2025

AMA | March 2025

Welcome to the March 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 Patre...

10 Maalis 20252h 58min

307 | Kevin Peterson on the Theory of Cocktails

307 | Kevin Peterson on the Theory of Cocktails

A lot of science goes into crafting the perfect cocktail. Balancing sweet and bitter notes, providing the right amount of aeration and dilution, getting it to just the right temperature and keeping it...

3 Maalis 20251h 16min

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