• Rick Ridgeway
National Geographic Adventure Hall of Famer Rick Ridgeway joins Boyd in the studio to tell his incredible story of guns, emeralds, smugglers and serving time in a Panamanian prison. Ridgeway also tells Boyd about his current work with Freedom to Roam, a new initiative dedicated to establishing space for wild animals to migrate.

• Tom Scoville
Tom Scoville hasn’t let a fused spine, artificial hips, two artificial knees and two artificial shoulders prevent him from climbing mountains. In fact he’s climbed all 54 peaks in Colorado over 14,000 feet—twice. Scoville tells Boyd what keeps him climbing.

• Seth Bauer
Boyd throws back an organic beer with Seth Bauer, editorial director of the Green Guide.

• Sylvia Earle
How do you draw a map of a landscape you can’t see? National Geographic Explorer-in-Residence Sylvia Earle did just that for the new book she co-authored, Ocean: An Illustrated Atlas. Earle joins Boyd in the studio to share what she discovered beneath the surface when she mapped the ocean floor.

• Cathryn Hilker
What if your house cat was a cheetah? Cathryn Hilker of the Cincinnati Zoo can tell you. She’s raised cheetahs, lions and tigers in her home! Hilker explains to Boyd how raising cheetahs in captivity is raises awareness and money for cheetah habitat conservation in Namibia.

• Bob Clark
Who wants a puppy when you can have a snake? Bob Clark talks to Boyd about his snake breeding business and why more and more people are choosing to own snakes as pets.

• Story-Bill Haast
If you handle snakes you’re going to get bitten. But Boyd tells listeners about Bill Haast, a 93-year-old snake handler who has immunized himself to the reptile’s bites by regularly injecting himself with a cocktail of poisonous snake venom!