00:45 The puzzle of PalaeospondylusOver a hundred years ago, palaeontologists discovered fossils of the aquatic animal Palaeospondylus. But since then researchers have been unable to place where this animal sits on the tree of life. Now, new analysis of Palaeospondylus’s anatomy might help to solve this mystery. Research article: Hirasawa et al. News and Views: Clues to the identity of the fossil fish Palaeospondylus 08:18 Research HighlightsA strong, silk-based version of mother of pearl, and the parrots that use their heads when climbing. Research Highlight: Silk imitates mother of pearl for a tough, eco-friendly material Research Highlight: A ‘forbidden’ body type? These parrots flout the rules 10:51 How lasers revealed an ancient Amazonian civilizationArchaeologists have used LiDAR to uncover evidence of an ancient civilization buried in the Bolivian Amazon. The team’s work suggests that this area was not as sparsely populated in pre-Hispanic times as previously thought. Research article: Prümers et al. News and Views: Large-scale early urban settlements in Amazonia Nature Video: Lost beneath the leaves: Lasers reveal an ancient Amazonian civilisation 16:21 Briefing ChatWe discuss some highlights from the Nature Briefing. This time, the debate surrounding the first transplant of pig kidneys into humans, and the plants grown in lunar soil. Nature News: First pig kidneys transplanted into people: what scientists think BBC News: Moon soil used to grow plants for first time in breakthrough test Subscribe to Nature Briefing, an unmissable daily round-up of science news, opinion and analysis free in your inbox every weekday. See acast.com/privacy for privacy and opt-out information.