• Enric Sala
National Geographic Fellow Enric Sala says the world is running out of places to catch wild fish. A new study reports that global fisheries have greatly expanded over the past 50 years, but the global catch is declining. We’re running out of planet, but there is a solution, according to Sala.
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• Tara Stoinski
Tara Stoinski researches the social behavior of gorillas with the Dian Fossey Gorilla Fund International. Stoinski tells Boyd that sometimes it’s difficult to tell the difference in behavior between a group of male gorillas and a group of football players.
Visit the Dian Fossey Gorilla Fund International website

• Vijay Anand
Vijay Anand is fighting corruption in India, one rupee at a time. His organization 5th Pillar is dedicated to encouraging, enabling and empowering every citizen of India to eliminate corruption at all levels of society. To this end, 5th Pillar has printed millions of Zero Rupee Notes that ordinary people distribute every time they are asked for a bribe. Boyd tells Anand that he is going to test the note on his upcoming trip to India.
5th Pillar website

• Glynis Ridley
Jeanne Baret, the first woman to circumnavigate the globe under sail, disguised herself as a man. Author Glynis Ridley uncovers this fascinating tale in her new book, The Discovery of Jeanne Baret: A Story of Science, the High Seas, and the First Woman to Circumnavigate the Globe. Ridley joins Boyd to talk about this adventure.
Get the book

• David Braun
Join National Geographic's daily online news editor David Braun as he shares some of the week’s hottest stories. Braun and Boyd discuss new theories on how Stonehenge was built.
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• Jay Kirk
Author Jay Kirk’s new book, Kingdom Under Glass: A Tale of Obsession, Adventure, and One Man's Quest to Preserve the World's Great Animals, tells the fantastic story of famed explorer and taxidermist Carl Akeley. Kirk tells Boyd how Akeley once strangled a leopard with his bare hands.
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• Ken Nedimyer
Marine biologist Ken Nedimyer’s specialty is underwater farming. Nedimyer has pioneered the technique of farm raising staghorn coral colonies. Boyd caught up with Nedimyer on a recent trip to Florida to talk about the finer points of parenting polyps.
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• Glenn Hodges
There is an ancient city hiding just outside St. Louis. The 13th century Native American hub is called Cahokia, and author Glenn Hodges writes about the forgotten city in the January National Geographic magazine.
Read the article

• John Woestendiek
Would you pay $100,000 to clone your pet dog? John Woestendiek explores this complex question in the book, Dog, Inc.: The Uncanny Inside Story of Cloning Man’s Best Friend. Woestendiek joins Boyd to talk about the strange world of commercial dog cloning.
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• Story-Lucky Easter bunny
In his regular Wild Chronicles segment, Boyd shares a story about one very lucky Easter bunny.