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Exploring the importance of the polar seas as polar oceans warm and sea ice disappears.

How cultural traditions have led to remarkable innovations, from navigating the featureless Arctic to building energy-efficient homes in the desert.

A flood brings new challenges for the big cats; for the first time, the lion cubs experience water and the danger it brings.

Vulture nests in Spain; the long shadow of dictatorship in Albania; the threat of rock avalanches may lead entire villages to be abandoned in Switzerland; high-tech to fight forest fires in Greece.

A panel of journalists provides reporting and analysis of the major stories emanating from the United States capital.

Science, health, technology and environment experts and professionals address issues such as artificial intelligence, medicine and climate science.

Margaret Hoover leads interviews and debates.

Functional movements help improve performance of daily activities.

Mr. McFeely visits a trumpet factory; King Friday declares he owns a comet.

Lyla and a new friend build a spaceship; Lyla learns her sisters can predict what the other wants, so she tries to do the same with Luke.

Lotta is determined to show Skyler that she is more than just "headphone girl"; the new kid in school causes a hullabaloo on the playground.

Daniel finds out he is going to be a big brother; Daniel wants to help prepare the baby's room but struggles with having to give up his old things for his new sibling.

Phoebe and Jay use Miss Jean's field guide to identify their new butterfly friend; Phoebe gets courage to perform at the talent show.

Cookie Monster uses his new Cookie Cart to bake for his friends; Grover tries magic to entertain his friends.

Buzz and Delete must lighten their suitcase or miss a cyber-whale adventure; Digit and Widget learn about weight while sorting Motherboard's storage room.

A joey steals car keys from Martin and Chris.

Uncover the diverse tapestry of Iowa's people, cultures and stories. Through compelling interviews, scenic visuals, and authentic storytelling, each episode explores the extraordinary lives of individuals who call Iowa home.

Margaret Hoover leads interviews and debates.

Experts analyze prominent international affairs topics and America's role in a shifting world.

Social, political and economic trends of American agriculture.

When a student is left badly burnt and in a coma after a house fire, the CID team overcome their reluctance to call in Professor T as it emerges that the victim was drugged, and the fire started deliberately.

A prominent couple is found murdered, and the crime scene has uncanny parallels to another murder that occurred 15 years before.

Professor T needs to decipher a macabre puzzle when a doctor and her family are found dead in a grisly tableau on their living room sofa, each having died by different means.

When an artisan baker is found dead after receiving death threats, Professor T uses his criminological insight to help police identify the murderer.

Professor T presents a case to his students that involves a caretaker accused of fatally shooting his rich employer.

After discovering the body of an undercover police officer, the CID team blunder into a Drugs Squad operation against a major trafficker that appears to implicate one of their closest colleagues.

As Judith and Suzie work with the police to find the killer, tensions rise among Becks' friends in the house.

The murderer in Corfu claims another victim; Eliot's condition worsens and Susan unexpectedly finds herself a suspect in a murder case.

Cushla's relationship with Michael deepens, despite growing tensions at home and school; Gina's drinking worsens, and family pressure mounts; Cushla learns unsettling truths about Michael's past, but passion and tenderness draw them back together.

An extravagant house party at the abbey gives the Crawleys a chance to reconnect with old friends, but some guests prove more welcome than others, and along with the celebrations come deceit and heartache.

Jean and Lionel (Judi Dench, Geoffrey Palmer) set the wedding date, and the script is finished at last.

Foggy finds a pile of clothes on a riverbank and assumes that someone has committed suicide.

Mervin begrudgingly agrees to watch a local women's football game with the team, but it's cut short when the star player is discovered with a fatal bullet wound.

Grammy Award-winning bluegrass musician Billy Strings performs highlights from "So Much for Goodbyes" and "Highway Prayers.".

As Judith and Suzie work with the police to find the killer, tensions rise among Becks' friends in the house.

The murderer in Corfu claims another victim; Eliot's condition worsens and Susan unexpectedly finds herself a suspect in a murder case.

Cushla's relationship with Michael deepens, despite growing tensions at home and school; Gina's drinking worsens, and family pressure mounts; Cushla learns unsettling truths about Michael's past, but passion and tenderness draw them back together.

Experts analyze prominent international affairs topics and America's role in a shifting world.

A workout focusing on the back and core helps to relieve and prevent back pain.

The Kratt brothers take a day off from adventuring to go camping, where they meet a mischievous little moose calf.

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.

Dylan realizes he doesn't love square-dancing; Carl teaches Nico how to ride a bike.

After Miss Elaina loses her mitten, her mom teaches her how to put things away so she can find them later; Prince Wednesday loses his comic book.

Phoebe learns what privacy signs are and how to use them to communicate to neighbors; Jay gets nervous about getting a haircut.

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

Ellie's so excited to be going home to Jamaica that the Wombats and Mr. E start to worry whether she'll come back; Buckley comes over for a playdate with Zadie.

The pals find a box of Golden Crunchdoodles cereal; Donkey, Panda and Bob Dog want to play different things.

Uncle Steve takes the kids to the park for the Wonder Walrus show; Rosie and Javi make a space museum.

Elinor and friends build a log bridge over a stream; the kids set out to learn everything they can about blinking when Ari is crowned the blinking champion at school.

A series of mishaps gives Alma "the grumps"; Junior wants to play basketball with the big kids and make a basket.

Molly and Tooey decide to make a few of their own Alaska Native superheroes; Molly wants to fix up her old sled for Trini, but she's not sure she is ready to part with it.

Madam C.J. Walker shows Xavier that working hard on his lemonade stand can help him afford the pogo stick of his dreams; Edwin Binney shows Xavier, Yadina and Brad that to work together as a team, they should listen to everyone's ideas.

Lily, Corky and Benny attempt to film their own weather broadcast, but need Great Grandpa Wallace's tools to create their weathercast.

Arthur helps D.W. prepare for a bikeathon; Francine whips Arthur's baseball team into shape.

The Kratt brothers take a day off from adventuring to go camping, where they meet a mischievous little moose calf.

Dubrovnik on the Adriatic Sea coast; Mostar, Bosnia and Herzegovina; Montenegro's Bay of Kotor.

Carmody is challenged with learning how to be a vet; the new farmers have an illness among their herd; Helen rallies the community to help the newcomers while she awaits some personal news.

As Judith and Suzie work with the police to find the killer, tensions rise among Becks' friends in the house.

Charles Schulz comic strip art; a 15th-century Ming dynasty celadon dish; a Eugene Sartory bow and French violin.

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

Vintage finds include a Gibson style H-2 mandola circa 1918, a Tiffany Studios Daffodil lamp circa 1906 and an 1852 Lincoln manuscript.

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

An adventure across Iowa's scenic byways, enjoying the historic sites, unique attractions and natural beauty along the way.

Uncover the diverse tapestry of Iowa's people, cultures and stories. Through compelling interviews, scenic visuals, and authentic storytelling, each episode explores the extraordinary lives of individuals who call Iowa home.

Cuban singer Omara Portuondo's life, from the stages of Havana's nightclubs to her worldwide fame as part of the Buena Vista Social Club.

A murder takes Oskar and Max's investigation into a world of underground gambling; Oskar's life is complicated by his feelings for Therese; Max questions if he and Clara are meant to be together.