It's been hidden in plain sight for 100 years, but what could this discovery be? We hear from Connie Gray, Young Scientist of the Year who conducted research on bird feathers and staying on the bird theme in Dangerous Dan, we hear about a common UK bird gone rogue internationally.

We answer your questions, this week its on why does hair turn grey? And we hear from our friend Professor Hallux about the bugs hiding in your mouth, and Techno Mum who is taking on the Techno Triva quiz, this week its all on Cost!