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The history, architecture, landscape and artwork of Chatsworth House, an English estate and home of one of Europe's most significant collections of fine art.

Two Alaskans search for childhood friends who survived the state's 1964 earthquake; a woman wants to thank a friend and her mom for protecting her from harm; a man searches for a Little League teammate.

Historians and descendants of homesteaders reveal details about pioneer life; filmed in Minnesota, North Dakota and South Dakota locations throughout the four seasons.

Singer-songwriter Role Model performs hits from "Kansas Anymore"; indie-rocker MC Lenderman & The Wind perform songs from "Manning Fireworks.".

Modern indigenous perspectives on Yellowstone and Glacier national parks.

Heading into the Rocky Mountains in Montana and Canada to examine the imperiled whitebark pine as it edges toward extinction.

Residents and coyotes learn to coexist in the urban landscape.

Exploring how people connect with the outdoors in Los Angeles; kayakers save a polluted river; Black surfers.

Performances include music by Johannes Brahms, Franz Joseph Haydn and Sergei Rachmaninoff.

An intermediate standing workout to stretch the vertebrae of the spine while strengthening the core and back.

Carl thinks his potato display is the best idea to show his school spirit; Nico tries to join the Junior Nutty Buddy Nut Lovers' Club.

The wombats battle sea monsters, surfing scoundrels and pointy rocks on their way to make a sandwich delivery; Mr. E. buys a robot to hand out balloons.

Ari grows impatient waiting for ketchup; Elinor, Olive and Ari have to figure out how to expand their clubhouse to fit all the new members of The Explorer's Club.

Manuel, who lives in the Sonoran Desert, tells Chris he has seen an ocelot, a wild cat that usually lives in the rainforest.

Molly teaches tourists how to fish responsibly; Molly helps Randall hide his long hair.

Elmo and friends have until the end of the day to set the record for the tallest cookie tower ever.

Ari grows impatient waiting for ketchup; Elinor, Olive and Ari have to figure out how to expand their clubhouse to fit all the new members of The Explorer's Club.

Panda is sad when an exciting holiday is over; Rockstar Penguin asks Donkey and Panda to make up a new dance.

A fast-paced workout ends with relaxation.

Chili con queso in soft flour tortillas; Gustavo Vázquez's family farm has grown pecans for generations.

The ancient origins of spaghetti and meatballs; charred red-sauce spaghetti and slow-cooked short rib ragù with pasta.

A picture frame that may have come from the Titanic or Lusitania; Woolworth signs; toy soldiers; journal full of liquor recipes.

The crucial ecological roles that beetles play in nearly every environment, and why they are often regarded "the most important species on the planet.".

David Suzuki explains to Xavier that by taking care of the earth, we take care of ourselves; Esther Martinez explains to Xavier and Yadina about how stories can connect people to their family histories.

Rosie wants Javi's popcorn for family movie night, so she tries to find the perfect trade; Rosie makes a seashell museum at the beach.

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 feeling left out, Luke decides to switch places with Stu; the Loops kids throw a surprise party for their parents.

Buster learns about growing and caring for plants; cupcake award.

Ms. O is speechless when a villain steals her voice; agents have trouble working together.

Benny's toy penguin is swept away by melting snow, transforming a day of sledding into an urgent rescue mission.

Coverage from Washington, D.C. and London, with a regular panel of guests from across the political spectrum discussing the biggest stories of the day.

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

Idaho state gems and gold nuggets circa 1905; 1935 Gum Inc. Mickey Mouse cards; 1826 portraits attributed to the Guilford County Limner.

A 1980 Topps basketball cards box; Marvel The Amazing Spider-Man comics; an Alexej von Jawlensky Meditation oil.

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

News. Reporting on the day's international news from London and from BBC correspondents around the world.

Christiane Amanpour leads discussions about world issues and interviews with global leaders.