Here are some television stories I filmed for the National Geographic show “Wild Chronicles,” airing on PBS, from diving with whale sharks to bicycling in Cambodia’s remote Mondulkiri forest.

Mongolia has shifted away from an economy based on agriculture and herding to one based on mining. With economic transformation comes opportunity, but also environmental damage and growing pains for local residents, as the landscape is carved up by mining machinery and trucks.

Mondulkiri Protected Forest is a large protected forest in eastern Cambodia that was established in 1999. Part of the largest protected area complex in Southeast Asia, it was renamed Srepok Wildlife Sanctuary in 2016. Some years back, I joined a group of environmentalists and tour operators on a bicycle trip through the very sparsely populated forest, and filed this story.

As the largest fish in the sea, reaching lengths of 40 feet or more, whale sharks have an enormous menu from which to choose. Fortunately for most sea-dwellers—and us!—their favorite meal is plankton. They scoop these tiny plants and animals up, along with any small fish that happen to be around, with their colossal gaping mouths while swimming close to the water’s surface. Here is a story I did on whale sharks in Mexico: