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A visit to the Maldives focuses on coral reefs and the urgent efforts to help them survive climate change.

Geoffrey Baer meets dancers, musicians, architects and writers in Havana and experiences the color, culture and history of the city.

The struggle for freedom by the ancestors of Maya Rudolph, Shonda Rhimes and Keenen Ivory Wayans.

Building endurance and power in the quads, one of the largest muscles in the body.

Uniting mind and body with the standing rotation, revolved open twist, and the apex pose, Twisted Sister.

Martin and Chris try to rescue a foal who is separated from his mother by a rogue wave.

The Hunters investigate a mysterious rain that happens with no clouds in the Indonesian rainforest.

Luke, Lyla and Everett test vacuums; Lyla makes cookies using substituted ingredients.

Carl and Sheldon are on a thank-you mission; Carl shows his friends the right way to play with pet rocks.

King Friday makes Daniel king for the day, and he learns that the most important part of the job is to be kind to his neighbors.

Molly finds a newt in her boot while exploring Wizard Island; Molly tries to return a rock to its rightful place.

Exploring the oo l/oo/k vowel team; Fancy Shmancy Word of the Day: crooked; Heart Word: do; Dott is too hard on Dusty for leaving a book on the floor.

Movement and momentum; designing a better bobsled; pediatrician Mona Hanna-Attisha discusses caring for children's health.

A 16-year-old runs a fashion recycling business.

Grover tries to cheer up Elmo, who is feeling sad after his dad leaves for a work trip.

When Rosie and Javi find out Tia's bringing home a dragon, they anxiously prepare for its arrival; Rosie finds a lucky charm in her backyard, but soon her luck starts to change.

Duck enjoys "me time" at the beach; the pals like different things at Donkey's sleepover.

Phoebe and Jay learn how to sort items; Phoebe and Jay learn how to make food labels, so everyone can participate in the potluck.

After a disagreement, Olive and Ari learn about how nature works, which helps them resolve their issue; the kids learn about meadows.

The Wombats use a 3D printer to save Cake Day when Mr. E's cake table collapses; the Wombats create a pretend vacation to cheer up Buckley.

Agents compete in Olympic-style games, with the winner being named Ms. O for the day.

Buster heads off to summer camp; Arthur is jealous of Buster's magic tricks.

Lemon-braised chicken with pearl couscous, artichokes and chickpeas; dish soap; the power of evaporative cooling; fattet hummus (crispy pita with garlicky yogurt and chickpeas).

Old port town of Nafplio; the ruins of Olympia; preserved theater at Epidaurus; ancient capital of Mycenae; Mani Peninsula.

An exclusive journey into a cave that houses well-preserved Stone Age art of lions and mammoths, and how scientists are unlocking the secrets of these masterpieces of early human creativity.

Nineteenth-century Hawaiian poi pounders; a Dirk van Erp copper vase; an 1888 Joseph Nawahi oil painting.

Co-anchors Amna Nawaz and Geoff Bennett and correspondents offer in-depth analysis of current events.

Traveling the highways and byways of Tennessee.

A weekly Tennessee gardening series featuring tips, recipes and tours.

How Latinos contributed to the shaping of modern America despite sometimes being regulated to the fringes of mainstream society.

The struggle for freedom by the ancestors of Maya Rudolph, Shonda Rhimes and Keenen Ivory Wayans.

Twenty-four hours a day, the latest national and international stories as they break.