Cancer drug gene screen, and world's most powerful rocket

New CRISPR technology tool uncovers genes that have become resistant to chemotherapy drugs. We speak with the scientist behind the cancer discovery. Plus, how butterflies use their wing patterns to confuse and evade predators; why Fiji has declared HIV a national emergency; and how SpaceX's Starship rocket launch is fuelling the race back to the Moon. Like this podcast? Please help us by supporting the Naked Scientists (thenakedscientists.com/donate)