Dr Chris Smith and the Naked Scientist team present the latest science news, analysis and breakthroughs. In today’s programme: Nausea in pregnancy, scientists have solved why it happens and what we can do about it. Also, COP28 is over, but what was actually achieved And what science is revealing about the methods of great artists like Rembrandt. Plus Titans of Science returns, talking to leading scientists around the world, and today’s relaunch features former astronaut and commander of the International Space station, Chris Hadfield.