• Robert Swan
Robert Swan was the first person ever to walk to both the North and South Poles. And because of global warming, he may be the last! Swan talks with Boyd about his polar expeditions and his new book, Antarctica 2041: My Quest to Save the Earth’s Last Wilderness.
Buy the Book

• Kelly Wilcox
National Geographic Young Explorer, Kelly Wilcox, spends much of her time sifting through really old garbage! Wilcox tells Boyd how digging up animal bones from ancient Egypt tells her about the diet of the workers who built the pyramids.
Read More

• Albert E. Dien,Ph.D.
Albert E. Dien, Ph.D., professor emeritus at Stanford University, is the guest curator for the "Terra Cotta Warriors: Guardians of China's First Emperor" exhibition on display from November 19 to March 31, 2009 at the National Geographic Museum. Dr. Dien gives Boyd a sneak peak at the exhibit and explains the warriors’ history and construction.
Buy Tickets

• David Braun
David Braun, editor of National Geographic News, talks with Boyd about bio-engineered, super-smart rats.
Read More

• David De Rothschild
You’ve heard of a ship in a bottle? How about a ship made of bottles? Emerging explorer, David De Rothschild has designed and built a 60-foot catamaran out of PET plastic and recycled bottles. Dubbed the Plastiki, the vessel will be launched later this year. De Rothschild joins Boyd to discuss the Plastiki and his upcoming expedition across the Pacific ocean from San Francisco to Sydney, Australia.
Read More

• Charlie Hamilton James
Photographer Charlie Hamilton James was able to capture the kingfisher diving, fishing and nesting for “Blaze of Blue” in the November issue of National Geographic magazine. James tells Boyd how he was able to showcase the brilliant colors and blazing speed of this beautiful bird.
Read More

• Vance Holliday
National Geographic grantee and University of Arizona archaeologist Vance Holliday recently discovered evidence of cavemen hunting elephant sized, ice-age creatures called gomphotheres. Holliday and Boyd discuss how men armed with only a spear could take down such a beast.
Read More

• Jacob Scherr
Jacob Scherr is director of the National Resource Defense Council’s BioGems Initiative. But he was also on the scene when Boyd took a bad spill on his bike a few months ago. Scherr and Boyd discuss trips to the emergency room and saving the planet.
Read More

• Boyd shares a story that proves recycling, while in vogue right now, is nothing new.