Catalyst: Acoustic Ecology Lab

“Catalyst” explores the importance of listening and how the environment and our hearing are intertwined.

WATCH: See more from season 2 of “Catalyst”

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In this segment:

Garth Paine, Sabine Feisst, Kyle Hoefer

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Finding Your Roots digs into season seven

Finding Your Roots with Henry Louis Gates, Jr.

Today’s most compelling personalities discover the surprising stories buried within their own families in the seventh season of the critically acclaimed PBS series

Discover new worlds with Think Wednesday

Explore the lives of pumas in South America, intricate food chains in Iberia and the chemical reactions that shape our world with Think Wednesday. Tune in to this three-part series of science programs, starting Wednesday, Feb. 3 at 7 p.m.

Sundays on Masterpiece: 'All Creatures Great and Small'

James Herriot’s adventures as a veterinarian in 1930s Yorkshire get a glorious new adaptation in All Creatures Great and Small, a seven-part series based on his beloved books.