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We have a new, landmark climate deal, signalling the beginning of the end of fossil fuels. But even as the announcement at COP28 includes commitments for some of the most pressing issues, including giving money to countries most affected by climate change and setting goals for more renewables, some critics aren’t satisfied. With weak language around “transitioning away from” fossil fuels, does the deal go far enough?

The first ever scientific discoveries have been made by an artificial intelligence chatbot, says Google Deepmind. The company claims its new large language model FunSearch has discovered solutions to mathematical and computing problems. Why this could be a promising source of advances – even if 90 per cent of its output is essentially useless.

Arctic-dwelling seals don’t just rely on their big blubbery bodies to keep warm, but their noses too. How intricate nose bones – the most intricate ever studied, in fact – help them to retain heat and moisture as they breathe.

There’s a problem with the universe. At least, with our understanding of it. The way that matter clumps together on very large scales seems to be a little off, and the two main measurement methods just don’t agree with each other. While it's not unusual for there to be discrepancies with the standard model of cosmology, this issue is potentially a biggie, and could reflect significant gaps in how we understand the very stuff our universe is made of.

Plus: How to stop stress from affecting sleep, what makes a “good” didgeridoo and a mind-reading cap that converts thoughts to text.

Hosts Timothy Revell and Christie Taylor discuss with guests James Dinneen, Matthew Sparkes, Chen Ly and Leah Crane. To read more about these stories, visit newscientist.com.

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Weekly: New climate deal at COP28; AI mathematician; a problem with the universe

The World, the Universe and Us