Is Diehard a Christmas Movie?

Dr Karl answers your questions from the first episode of 2023 Science. Lucy asks if diehard movies are Christmas movies, while Tasman ponders whether chimps have ADHD and anxiety disorders like us. Dr Karl explains why sickle cell anemia is a good thing for Africans because it protects them from malaria. And we find out how humans could pass on weaker genetics to future generations.