• Seth Shostak
National Geographic Weekend goes hunting for aliens with Seth Shostak, author of the new book from National Geographic, Confessions of an Alien Hunter: A Scientist's Search for Extraterrestrial Intelligence. Shostak, senior astronomer at the SETI (Search for Extraterrestrial Intelligence) Institute, joins Boyd to talk about life on other planets.
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• Jean-Michel Cousteau
Thirty years after his father Jacques-Yves Cousteau took television viewers underwater, Jean-Michel Cousteau also is exploring the depths in his new PBS series “Ocean Adventure.” Cousteau joins Boyd to talk about two new films, one on orca whales and one on beluga whales.
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• Andy Rouse
Photographer Andy Rouse has been to Africa multiple times and led many expeditions to see mountain gorillas in Rwanda. But what he saw, and captured on film, the last time he went surprised him. Rouse tells Boyd how he watched the great apes get drunk on bamboo sap!
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• Susan Magsamen
• Planning ahead and wondering what to do with the kids this summer? Well Boyd and Susan Magsamen, author of The 10 Best of Everything for Families: An Ultimate Guide for Travelers, have more suggestions.

• Kimi Puntillo
As a child, Kimi Puntillo used to read National Geographic magazines and dream about traveling the world. She finally found a way to see the exotic places she dreamed about: running. Marathons, half-marathons and shorter races have taken Puntillo all over the world and she writes about her experiences in the new book Great Races, Incredible Places: 100+ Fantastic Runs Around the World. Puntillo joins Boyd to talk about running in Antarctica and on Mount Everest.
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• Rob Draper
Australia has been suffering a major drought for seven years. Author Rob Draper writes about the hardship this has brought upon farmers and city dwellers alike in the April issue of National Geographic magazine. Boyd and Draper discuss the article, “Australia’s Dry Run.”
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• Trevor Corson
Sushi has taken America by storm. So much so that it’s possible to find the Japanese treat in corner restaurants and supermarkets across the country. But this wasn’t the case 20 years ago. In his book The Story of Sushi: An Unlikely Saga of Raw Fish and Rice, Trevor Corson spotlights “the fast food of old Tokyo.” Corson joins Boyd in the National Geographic cafeteria to talk and taste sushi.
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• Eugene Cordero
Did you know that eating fewer hamburgers might do the planet more good than not driving an SUV? Eugene Cordero, co-author of Cool Cuisine: Taking the Bite Out of Global Warming, joins Boyd to talk about improving your carbon footprint and your diet at the same time.
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• Boyd finds that eating a sustainable diet is sometimes easier said than done.