Episode 314

Weight-loss drugs Ozempic and Wegovy have been shown to slow down - or even reverse - the ageing process. In a trial of 84 people taking semaglutide, their biological age dropped by 3.1 years on average, with some organs becoming almost 5 years younger. Based on this new research, this finding could make these some of the most impactful anti-ageing drugs on the market. So how are they doing it?

Scientists have very nearly created a new lifeform. A synthetic bacterium has been created with 101,000 changes to its genome - clearing up redundant code in its DNA. By freeing up codons in its genetic code, this bacteria could make new kinds of proteins unlike anything that exists naturally - and pave the way for creating virus resistance bacteria.

The recent earthquake off the coast of east Russia was the sixth biggest ever recorded. Thankfully the ensuing tsunami has been manageable - unlike previous record-setting quakes. With two large “foreshocks” before the big one, we ask a professor of tectonics about the geology of the region. 

Chapters:

(00:34) Weight-loss drugs slow down ageing

(10:59) Creation of a new synthetic bacterium

(21:52) Geology of the Russian earthquake

Hosted by Rowan Hooper and Sam Wong, with guests Alexandra Thompson, Michael Le Page, Andrew Steele, Wes Robertson and Lisa Mcneill.

To read more about these stories, visit https://www.newscientist.com/

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