This episode of the Physics World Weekly podcast features <a href="https://people.ast.cam.ac.uk/~gpe/">George Efstathiou </a>and <a href="https://www.cita.utoronto.ca/~bond/">Richard Bond</a>, who share the <a href="https://www.shawprize.org/">2025 Shaw Prize in Astronomy</a>, “for their pioneering research in cosmology, in particular for their studies of fluctuations in the cosmic microwave background (CMB). Their predictions have been verified by an armada of ground-, balloon- and space-based instruments, leading to precise determinations of the age, geometry, and mass-energy content of the universe.”

Bond and Efstathiou talk about how the CMB emerged when the universe was just 380,000 years old and explain how the CMB is observed today. They explain why studying fluctuations in today’s CMB provides a window into the nature of the universe as it existed long ago, and how future studies could help physicists understand the nature of dark matter – which is one of the greatest mysteries in physics.
Efstathiou is emeritus professor of astrophysics at the University of Cambridge in the UK – and Richard Bond is a professor at the Canadian Institute for Theoretical Astrophysics (CITA) and university professor at the University of Toronto in Canada. Bond and Efstathiou share the 2025 Shaw Prize in Astronomy and its $1.2m prize money equally.
This podcast is sponsored by The Shaw Prize Foundation.
<ul>
<li>Shrinivas Kulkarni, the 2024 Shaw Prize in Astronomy winner, has also appeared on the podcast. <a href="https://physicsworld.com/a/shrinivas-kulkarni-2024-shaw-prize-in-astronomy-winner-talks-about-his-fascination-with-variable-and-transient-objects/">You can listen to that interview here</a>.</li>
</ul>

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Richard Bond and George Efstathiou: meet the astrophysicists who are shaping our understanding of the early universe

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