Do octopuses dream? Neural activity resembles human sleep stages

In this episode:00:46 Inside the brains of sleeping octopusesResearchers have probed the brains of octopuses and confirmed previous reports suggesting that these invertebrates have a two-stage sleep cycle similar to that seen in many vertebrates. The team suggests this system may have evolved independently in the two groups, as there are millions of years of evolutionary history between them. However, despite its presumed importance, it is a mystery why this system exists at all.Research article: Pophale et al.Nature Video: Do octopuses dream? Brain recordings provide the first clues10:37 Research HighlightsA huge volcano eruption that caused the most extreme lightning ever recorded, and a paper-inspired fabric that can keep you warm and cool.Research Highlight: Underwater volcano triggered the most intense lightning ever recordedResearch Highlight: Fabric warms or cools the body at the flick of a switch13:03 A hormone associated with more effective weight lossCalorie-restricted diets often lead to rapid weight loss at first, but over time this can slow, or even reverse. This is due to the body adapting; slowing its metabolism to use energy more efficiently. Now though, researchers have identified a key hormone in mice that seems to prevent this slowdown, which could prove useful for people who wish to lose weight.Research article: Wang et al.20:02 Briefing ChatWe discuss some highlights from the Nature Briefing. This time, the robot raspberry that teaches fruit-picking machines how to harvest, and an exoplanet without an atmosphere.Nature Communications: Junge et al.Nature Video: A robotic raspberry teaches machines how to pick fruitNature News: Life in the cosmos: JWST hints at lower number of habitable planetsSubscribe to Nature Briefing, an unmissable daily round-up of science news, opinion and analysis free in your inbox every weekday. Hosted on Acast. See acast.com/privacy for more information.