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In part 1, “Energy Switch” looks at the health of fisheries and other sea life. We’re joined by Dr. Margaret Leinen and Dr. Richard Spinrad.

Explore how four-limbed animals became the blueprint for nature’s most versatile design and the unique designs that make up Earth.

In Nepal, a team of wildlife experts explores tiger island, made up entirely of tigers, and follows two remarkable big cat families.

Join Elmo and the Sesame Street gang on a once-in-a-lifetime African safari adventure to meet the young elephants.

Don’t miss these shows leaving Arizona PBS Passport in October. Enjoy all your favorites in one place before they’re gone!

While much of the Arctic’s ice is in retreat, a group of scientists are testing a radical idea to preserve it.

On “Ages of Ice,” a story of scientific daring, discovery, grit and human endeavor unfolds, where unlocking the mysteries of our icy worlds is key.

On “Resolve to Solve with Miles O’Brien,” conservationist Kris Tompkins has dedicated her life to rewilding Argentina’s Iberá Wetlands.

Learn the story of life on the supercontinent of Pangea, shedding light on the world of the Permian, how it ended and how life recovered.

Discover the American Southwest and the Colorado River, with the region’s deep cultural history and the urgent fight to protect its future.