Nature Podcast

Spineless sea squirts shed light on vertebrate evolution, and an iodine-fuelled engine powering a satellite in space.In this episode:00:45 A story of sea squirts, ancient vertebrates and missing genesWhen a PhD student set out to study the developmental pathways of a strange sea creature, he hoped to shed light on the origins of vertebrate animals. Instead, researchers found themselves investigating a strange case of missing genes. We hear why gene loss could be a more significant factor in evolutionary processes than was previously thought.Research article: Ferrández-Roldán et al.08:17 Research HighlightsThe unusual crystal that gives a beetle its glittering green sheen, and the genetics of a fish’s 200 year lifespan.Research Highlight: Weird crystal makes beetle a living jewelResearch Highlight: Some of Earth’s longest-lived fish show how to reach extreme ages10:43 An iodine-fuelled engine for satellitesIn space, many satellites use xenon-fuelled ‘electric propulsion systems’ to maneuver. However, xenon is