On this week's Science Weekly, why blood is red and do we really know if a meteor killed the dinosaurs? Dan answers your questions, plus we learn about a creature from the depths of the ocean that can go three months between meals and sweats slime with Dangerous Dan and Dan chats to biologist Nessa Carey all about gene editing. 

And, of course we check in with Enn & Gee and Techno Mum.