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The John Batchelor Show

S8 Ep322: Cosmological Mysteries: The Little Red Dots. Guest: DEVESH NANDAL. The James Webb Space Telescopediscovered "little red dots"—compact, bright objects in the early universe that are not easily explained as galaxies or accreting black holes. These findings

The John Batchelor Show

John Batchelor

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4.62.7K Ratings

🗓️ 16 January 2026

⏱️ 14 minutes

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Summary

Cosmological Mysteries: The Little Red Dots. Guest: DEVESH NANDAL. The James Webb Space Telescopediscovered "little red dots"—compact, bright objects in the early universe that are not easily explained as galaxies or accreting black holes. These findings challenge the standard model of cosmology, suggesting the universe matured much earlier than previously thought by 21st-century scientists.
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Transcript

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0:00.0

This is Hotel Mars. I'm John Batcher with David Livingson, Dr. Space of the Space Show, joining me, and we're

0:21.9

off to the beginning of the beginning. We have a mystery at hand. It's called colloquially the

0:29.0

little red dots. And we have someone to help us understand what those are, why their discovery of

0:36.6

those little red dots is both exciting and

0:39.6

consternating, and what this means about the general theory of cosmology that as

0:45.2

extent at the beginning of the 21st century, I welcome our colleague and friend, Devis Nandal,

0:52.8

a postdoc at the Center for Astrophysics at Harvard

0:56.1

and Smithsonian, to explain how we got here with little red dots. DeVish, a wonderful good

1:03.6

evening to you. It's a joy to talk about something that happened 13 billion years ago, and that

1:08.8

were just perceiving it thanks to the James Webb Space Telescope.

1:12.4

The discovery is recent. When you first heard of it in your work, what did you make of it?

1:18.0

What was the buzz about it? Was it there's something on the lens? We've got to clean James Webb?

1:23.7

Or we thought we'd see this? We were sure they were there, or now what do we do?

1:28.9

Good evening to you, Devis.

1:30.6

Hi, good evening to the both of you.

1:32.2

And thank you very much for having me on this wonderful forum.

1:35.8

Yes, I'll be glad to share how it really started about two years ago with James Webb.

1:40.9

First of all, we were very confident with what James Webb has been giving simply

1:44.6

due to the credibility established already a year or so while in operation. So the results were

1:50.5

not just coming from one source, but multiple places in the universe, let's say. Wherever you

1:55.7

would look, we would find these little red dots. And there was no issue with a lens or something, but it did pose some

2:02.9

very interesting questions about these sources, these little red dots, they seem to be rather

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