Castellers, also known as human towers; grizzly bears; security for marijuana businesses; the color blue.
Phil Keoghan helps tag whale sharks. Correspondents investigate super recognizers, life in Fukushima and heart disease in mummies.
This episode explores an invasive species, rehab facilities, tracking whales, and wolves.
Phil Keoghan tags lions in Zambia. Correspondents explore manmade earthquakes, chocolate, designer dogs and Cory Booker.
Phil Keoghan tries an ancient martial art in India. Correspondents investigate deadly tornadoes, reporters at risk in Cambodia and talking whales.
Phil Keoghan goes inside Nascar. Correspondents investigate a human sacrifice site, DNA testing and new probiotics.
Phil Keoghan helps tag bears in Maine. Correspondents investigate the Nasca lines in Peru, Viking giants in Iceland and the future of farming.