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Check out a volcanic eruption and learn how it caused a tsunami. Then learn about the scientific phenomena of the Arctic’s sinkholes.

In the thin-air pledge special “Rick Steves’ Mighty Alps,” join Steves on an alpine adventure from Italy to Austria to Switzerland to France.

Follow Patrick Dykstra in his quest to connect with and understand the hidden nature of the world’s greatest animals.

Check out featured shows this Wednesday on Arizona PBS. Exciting episodes from “Nature,” “Trail Mix’d,” and “NOVA” that you will surely enjoy.

Get an look at a silverback family in Gabon’s Loango National Park. Watch brave researchers in the wild coasts in the African tropics.

Follow scientists as they search for new clues to how mammals moved from land into the sea to become the largest animals on Earth.

Animals big and small from across the globe go on epic journeys through streams and mountains to find a mate before its too late.

For generations, America’s national mammal, the buffalo, sustained the lives of Native people, whose culture intertwined with the animal.

A celebration of one of Earth’s most iconic and beloved birds, featuring all 18 species of penguins for the first time, from New Zealand, Cape Town, the Galapagos Islands and Antarctica.

Former Interior Secretary Stewart Udall leaves a legacy of conservation and environmental justice, inspiring people to work together.