27 June 2025
About this episode
A groundbreaking experiment in reproductive biology has resulted in mice being born from two biological fathers. By fusing sperm and putting them into an emptied egg cell, researchers in China have produced healthy and fertile offspring from two male mice. While it’s early days and the technique requires hundreds of embryos to get results, it opens up the possibility of same-sex reproduction in mammals, including humans, in the future.
New insights into the power of sleep reveal how short naps can boost creativity. A study found that reaching a certain stage of sleep, known as N2, significantly increased people’s chances of having an “aha!” moment. It’s more evidence of how deeply intertwined sleep is with problem-solving and innovation, and why naps might be more productive than we thought.
One ancient lizard family managed to survive the asteroid that killed the dinosaurs, and they’re still around today! ŮСƵs have traced the lineage of night lizards back to over 90 million years ago. Their ability to shelter underground and survive on little energy may have helped them live through one of Earth’s biggest disasters.
Chapters:
(00:38) Same-sex reproduction breakthrough
(12:09) Power naps and creativity
(22:37) Ancient lizard survives dinosaur-killing asteroid
Hosted by Rowan Hooper, Penny Sarchet, and Michael Le Page.
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