This week, spilling nuclear secrets, and a mysterious period in the Universe’s history.In this episode:00:46 "The most dangerous spy in history"We hear the story of Klaus Fuchs, who gave away the details of building an atomic bomb. Books and Arts: The scientist-spy who spilt secrets of the bomb08:00 Research HighlightsEnvironmental impacts of electric scooters, and the Goliath frog engineers. Research Highlight: Trendy e-scooters might not be as green as they seem; Research Highlight: Enormous frogs heave rocks to build tadpole ‘nests’10:33 Signals from the ancient UniverseResearchers hope that radio signals from ancient hydrogen will further their understanding of galaxy formation News Feature: The quest to unlock the secrets of the baby Universe18:17 News ChatChanges to the US Endangered Species Act, and what a microbe might tell us about the evolution of complex life. News: Trump administration weakens Endangered Species Act; News: Scientists glimpse oddball microbe that could help explain rise of complex life For information regarding your data privacy, visit acast.com/privacy