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A historian explores the surprising connections between two mountain rescue groups on opposite sides of the world, exploring what can be learned from these heroic, volunteer first responders about how to build better societies.

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

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

When the Soviet Union falls, Russia welcomes U.S. astronauts to their space station, Mir, but cooperation between former Cold War enemies is threatened by a run of disasters onboard.

A look at how the telescope was invented, from Galileo to Edwin Hubble, and how the invention reaches the universe 13 billion light-years out.

Three bachelors embark on a seven-day dating camp where they try to make sense of their authentic and constructed selves and find the self-confidence they need to land a date.

An intermediate workout to strengthens the core and open the chest and pectorals also helps to improve posture.

A new exercise uses the fingers and breath to control abdominal muscles.

Buster starts an archaeological craze when he finds an arrowhead; Arthur attends a medieval fair.

As Jimmy Jam's Scrambler Machine scrambles Odd Squad communication, the villains plan to unleash oddness; Dr. Dry steals the Sandbeast's golden egg.

The Kratt brothers use a new archery skill to rescue baby animals from Donita Donata's yacht.

The Hunters find a stowaway in their picnic basket, a little furry dog.

Lyla and Everett struggle to play Hot Cross Buns at the same tempo, and they learn how to read music; Lyla is upset when Luke's snack becomes popular.

Carl gets a universal screwdriver for his birthday; a storm creates a hole in the walkway to Carl's house.

Daniel is disappointed that he is not allowed to use his new toy float in the neighborhood pool; Daniel and Miss Elaina visit Ducky at the farm.

Phoebe and Jay create a game show for Grandma; Phoebe and Jay must find the best way to spend the community coin jar money by taking a building-wide vote.

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

The wombats invent a color game; Super invents a Piggyback rider.

Donkey is disappointed to miss Cheesy Con after she hurts her hoof; Stanley's pals help him get things back on track for his one-dragon show.

Molly rushes to find a new gift for her new friend, Kevin; Grandpa Nat's new drone is swept away by a dust devil.

While painting outdoors, Elinor and her class experiment with natural items that they find after they run out of paint; Elinor, Ari and Olive help Mrs. Hippo pick up litter.

As Jimmy Jam's Scrambler Machine scrambles Odd Squad communication, the villains plan to unleash oddness; Dr. Dry steals the Sandbeast's golden egg.

The Kratt brothers use a new archery skill to rescue baby animals from Donita Donata's yacht.

Various exercises ranging from vestibular system to feet and gait.

Exploring Northern California's Fall River Valley in the middle of winter.

Two approaches to stitching from real-life imagery; creating photo-realistic subject by creating the highlight, midtone and shadows; stitching on a fabric picture.

The myths and realities of the American cowboy.

A hand-drawn map taken from the body of a Japanese soldier during World War II; a cane topped with a coiled snake; origins of the Theremin.

Live news program produced out of BBC's Washington, D.C. bureau; host Sumi Somaskanda.

Early spring in Joshua Tree National Park.

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

In Canada, a baby turtle ventures through a forest in search of the lake where she will spend the next 50 years; a young bush baby in South Africa searches for a new home.

NASA's New Horizons probe captures the first-ever detailed images of the icy world of Pluto.

The colorful world of Earth's essential pollinators -- bees, moths and butterflies.