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A gnarled old tree adorned with Spanish moss stands sentinel over a moonlit stream.

New evidence sheds light on Turkey's Gobekli Tepe, the world's oldest temple, and how archaeologists think about the roots of civilization.

Explorers, archaeologists and scientists combine technology and ancient texts to prove that Hannibal's army crossed the Alps to launch an attack on Rome.

From its rich coral reef and lush jungles to its mountainous heart, Borneo holds more diversity of life than any other island.

The life of Harriet Tubman, a conductor of the Underground Railroad who helped guide enslaved people to freedom; narrator Alfre Woodard.

The roots of director Spike Lee and actress Kristin Chenoweth.

Cultivating better habits by slowing down and practicing balancing.

A workout improves the mobility of the spine.

The gang thinks about whether there is life on other planets.

A foggy Halloween almost derails Corky and Lily's trick-or-treating.

Lyla and Luke clean Stu without a bath; Lyla and Ale find a way to protect the callaloo plants from stink bugs.

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 learns that it's important to try to go potty before leaving the house; Daniel learns that sometimes when your tummy hurts, it could mean that you have to go potty.

Phoebe and Jay accidentally get paint on the mail and have to decode addresses; Phoebe and Jay find their parents' box of memories.

When Telly learns that earthworms are invited to Abby's garden party, his friends help him feel less scared.

Daniel learns that it's important to try to go potty before leaving the house; Daniel learns that sometimes when your tummy hurts, it could mean that you have to go potty.

Bob Dog imagines how others feel; Bob Dog makes a difficult choice for the Best Ball Fest.

Rosie and Javi get a new book, but it's in a different language; Rosie tries to form a club with her friends.

While helping Ms. Beaver construct a community garden the kids learn about rocks; Elinor tries to make her special dumplings all by herself.

On Alma's great-grandmother's 100th birthday, Alma wants to find Bisabuela the perfect gift; even though she can think of all kinds of things that Bisabuela likes, none of them are quite right.

When Telly learns that earthworms are invited to Abby's garden party, his friends help him feel less scared.

Lyla and Luke clean Stu without a bath; Lyla and Ale find a way to protect the callaloo plants from stink bugs.

The gang thinks about whether there is life on other planets.

A Mickey Mantle all-star watch; an 1840 Texas artillery short sword; an Edith Parsons "Turtle Baby" fountain.

Animal parents become masters of their environment in order to raise their young in the complex jungle; an orangutan spends eight years teaching her baby the ways of jungle living; a crab creates the perfect home for her crablets.

Exploring the hostile world of the desert and how plants survive by using weapons, camouflage and surprising alliances with animals.

Hunters and fisherman enjoy the great outdoors in Arkansas.

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

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

Arkansas preview.

A death onstage at a gala performance.

The owner of a rum distillery is murdered during a séance; the clues point to a ghost.

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

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

Far-away mountains appear to float in the clouds behind a gently flowing river in the foreground.

David Attenborough explores plants in the tropical rain forest.

Exploring water plants, some of which can count and hunt; some water plants escape from animals by rolling away or creating bubbles.

Explorers, archaeologists and scientists combine technology and ancient texts to prove that Hannibal's army crossed the Alps to launch an attack on Rome.

Animal parents become masters of their environment in order to raise their young in the complex jungle; an orangutan spends eight years teaching her baby the ways of jungle living; a crab creates the perfect home for her crablets.

New evidence sheds light on Turkey's Gobekli Tepe, the world's oldest temple, and how archaeologists think about the roots of civilization.

Moving from the periphery into the core using twists and backbends.

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

Chris finds a little lost red panda; before he can reunite her with her mother, Zach steals her, intent on giving her to Donita Donata as a birthday present.

After a groundhog predicts more winter weather, Benny is convinced he will have snow on his birthday so he plans a snow-filled birthday party.

Lyla and Everett play basketball against their moms; Lyla and Luke restore their old toy car to make it special for Stu.

Carl's medium-sized fuchsia yo-yo goes missing from his collection; a rainy day changes Carl's pool day plans.

Daniel and his parents have a sleepover at Prince Wednesday's castle; O the Owl is hesitant to camp in the yard.

Phoebe and Jay are asked to bird sit; photo time leads Jay to an outfit disaster.

Elmo tries to find something to do in the rain, while he waits to jump in the puddles.

Daniel and his parents have a sleepover at Prince Wednesday's castle; O the Owl is hesitant to camp in the yard.

Duck wants to fly with the bigger birds; Donkey loses Bob Dog's favorite toy.

Rosie, Iggy and Crystal make a movie; Mom finds a photo from the day they got Gatita.

The kids try to locate a missing Srta. Tapir at a music festival by listening for her drums; the kids try to track down a bird thief.

Alma and Eddie try to write a song in hopes of winning the Song of Summer Contest.

Elmo tries to find something to do in the rain, while he waits to jump in the puddles.

Lyla and Everett play basketball against their moms; Lyla and Luke restore their old toy car to make it special for Stu.

Chris finds a little lost red panda; before he can reunite her with her mother, Zach steals her, intent on giving her to Donita Donata as a birthday present.

A 1995 Muhammad Ali-signed tablecloth; a Panerai Radiomir watch with Rolex movement; a Frederick Douglass letter and Free Will Baptist Church archive.

New evidence sheds light on Turkey's Gobekli Tepe, the world's oldest temple, and how archaeologists think about the roots of civilization.

Explorers, archaeologists and scientists combine technology and ancient texts to prove that Hannibal's army crossed the Alps to launch an attack on Rome.

Arkansas preview.

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

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

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

Jazz vocalist Samara Joy makes her debut at London's Royal Albert Hall, offering unique twists on classic songs ranging from bossa nova to the Great American Songbook.

Jazz virtuoso Hazel Scott champions racial equality before getting caught up in the Red Scare of the 1950s.

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

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