Dan speaks to Professor David Cole-Hamilton about the Earth's helium shortage, and explores the almost unimaginable Stone Man Syndrome. Plus, he also chats to Hanna, another child inventor, who won the Dream Big, Princess competition.

Dan takes a tour of the solar system, including trying to unravel the mystery of the black hole. Plus, who would have thought a falcon could be that dangerous?

Dan speaks to Millie Marotta; her brand new book 'A Wild Child's Guide to Endangered Animals' features the species at risk from extinction (the ones we should really know about!) Plus, he encounters the poisonous plant of many names (but you may know it a

Dan chats to last year's winner of the Young Imagineers Competition - she invented a pollution-sucking pigeon! Plus, he meets one of the most dangerous dinosaurs and takes a fresh look at climate change with the help of Marina Ventura.

Dan is joined by author Ben Hoare for the release of his brand new book 'The Wonders Of Nature' - how will Dan do at Ben's science quiz? Plus, Dan meets the Black Mamba and welcomes to returning features to the podcast.

Dan is joined by Professor Michel Milinkovitch – he is a Professor at the University of Geneva and answers your question on chameleons! Plus, he explores the Third Outbreak of Cholera and why it was so deadly ...

In this double guest special, Dan speaks to Dr Sue Deuchars about the benefits of ear tickling (you read it right!) and discovers the science behind the VFX you see in the movies. Plus, he meets the mysterious Wallace's Giant Bee.

Is there more to slug slime than meets the eye? Sam Caseley explores with Dan. Plus, have you ever thought a cat could be deadly? Dan meets the deadliest cat in the world!

Dan welcomes to the studio Stephen Rickard to explore his brand new book, 'Why Haven't We Seen Aliens?' Plus he meets the ferocious Nile Crocodile and explores why giant slugs are ravaging Russia.

Nanogirl is another science podcast for kids! It answers your burning questions and shows you the wonders of discovery, made with school students who live in New Zealand.  It's made by RNZ and Nanogirl Labs. Tap here to subscribe to Nanogirl's Great Sci