Catalyst: Wildlife migration corridors

Biologists install digital cameras and microphones around wild habitats to observe where endangered animals migrate. By mapping wildlife movements conservationists can advise governments how to build infrastructure that protects biodiversity.

WATCH: See more from season 2 of “Catalyst”

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Catalyst: Acoustic Ecology Lab

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Andy Martinez

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NOVA "Ice Age Footprints"

Ancient footprint found in White Sands National Park

Ancient footprints in White Sands National Park reveal evidence of Ice Age humans that walked the land earlier than archaeologists thought.

Arizona Horizon election debates 2022: Republican candidates for Congressional District 6

Election 2022: Republican candidates for Congressional District 6

Republican candidates hoping to represent Arizona's sixth congressional district debate the issues.

Colombia - Wild and Free "From the Pacific to the Andes"

Aerial view of a river in Colombia

Journey to South America to explore the magnificent flora and fauna of Colombia, from the Pacific coast to the the Andes.