National Geographic

On this installment of ST, we speak with the British author and historian Huw Lewis-Jones, who is one of the editors (along with his wife, Kari Herbert) of a striking and engaging new book, "Explorers' Sketchbooks: The Art of Discovery and Adventure." As was noted of this book in a starred review in Library Journal: "The intersection of adventure, art, and memoir doesn't get any better than this title, edited by polar guides and husband-and-wife team Lewis-Jones and ­Herbert.

On this edition of StudioTulsa on Health, we learn about the Blue Zones Project.

Our guest on this edition of ST is Sandra Postel, a well-respected expert on freshwater conservation who's also the founder of the Global Water Policy Project. She co-created Change the Course, a national freshwater conservation and restoration campaign, and in 2010, she was appointed a Freshwater Fellow of the National Geographic Society, where she still serves as the Society's leading water expert.