The Conversation Weekly - Scientists can't agree on how fast the universe is expanding – why this matters so much for our understanding of the cosmos

Scientists can't agree on how fast the universe is expanding – why this matters so much for our understanding of the cosmos

06/13/24 • 24 min

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It’s one of the biggest puzzles in cosmology. Why two different methods used to calculate the rate at which the universe is expanding don’t produce the same result. Known as the Hubble tension, the enigma suggests that there could be something wrong with the standard model of cosmology used to explain the forces in the universe. Now, recent observations using the new James Webb Space Telescope are shaking up the debate on how close the mystery is to being resolved.

In this episode, Vicent J. Martínez, professor of astronomy and astrophysics at the University of Valencia in Spain, and his former teacher, Bernard J.T. Jones, emeritus professor of astronomy at the University of Groningen in the Netherlands, explain why the Hubble tension matters so much for our understanding of the universe. Also featuring Lorena Sánchez, science editor at The Conversation in Spain.

This episode was written and produced by Katie Flood with assistance from Mend Mariwany. Eloise Stevens does our sound design, and our theme music is by Neeta Sarl. Gemma Ware is the executive editor. Full credits available here. A transcript will be available shortly. Subscribe to a free daily newsletter from The Conversation.

Further reading and listening:

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Previous Episode

Creative flow: what's going on inside our brains when everything just clicks

If you’ve ever experienced a state of creative flow, perhaps when writing, playing music, or even gardening, you’ll know that it feels like everything just clicks into place. But what is actually happening inside the brain? In this episode, we speak to a neuroscientist who scanned the brains of jazz musicians as they were improvising, and revealed the secret ingredients need to achieve a state of flow.

Featuring John Kounios, professor of psychological and brain sciences at Drexel University in the US, plus an introduction from Kate Kilpatrick, Philadelphia editor at The Conversation in the US.

This episode was written and produced by Mend Mariwany, with assistance from Katie Flood. Eloise Stevens does our sound design, and our theme music is by Neeta Sarl. Gemma Ware is the executive editor. Full credits available here. A transcript is available here. Subscribe to a free daily newsletter from The Conversation.

Further reading and listening:

Next Episode

The Brexit roots of the UK's Rwanda asylum plan – and why other EU leaders might want to copy it

A controversial British government plan to send asylum seekers to Rwanda has been central to the UK’s response to a recent sharp increase in the number of people making the dangerous journey across the English Channel in small boats. But if the Conservative party lose the general election in early July, the Rwanda plan is likely to be abandoned.

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Featuring Nando Sigona, professor of international migration and forced displacement and director of the Institute for Research into International Migration and Superdiversity at the University of Birmingham and Michaela Benson, professor in public sociology at Lancaster University. They're both co-hosts of the Who do we think we are? podcast. This episode also includes an introduction from Avery Anapol, one of the politics team at The Conversation in the UK.

This episode was written and produced by Mend Mariwany with assistance from Katie Flood. Eloise Stevens does our sound design, and our theme music is by Neeta Sarl. Gemma Ware is the executive editor. Full credits available here. Subscribe to a free daily newsletter from The Conversation.

Further reading and listening: