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

David Attenborough explores London's Natural History Museum and meets creatures from the past, brought to life by CGI, including a giant eagle and colossal snake.

Paleontologists discover that dinosaurs thrived in unlikely places such as the cold and dark Arctic Circle.

Human skeletal remains found in the basement of Ben Franklin's British residence may have been used for science.

Marquis de Lafayette left France at the age of 19 and helped fight for America's freedom.

A garden blooming with butterflies at Frederik Meijer Gardens & Sculpture Park; flower arrangements; butterfly cocktail.

Romania's capital, Bucharest; Transylvania's fortified churches, cobbled merchant towns and castles; Maramures region of Romania.

A pose that strengthens the leg and hip muscles, relieves back pain, stretches the spine, opens the chest and tones abdominal organs.

A standing and floor workout includes stretches to increase flexibility in the back and improve posture.

A wildcat disrupts a game of badminton.

Corky is selected to make a presentation at school during a science day celebration, but humidity jeopardizes her project.

Lyla has to backtrack her hike at Moon Rock Cove to find her mom's missing phone; the Loops kids divide up kitchen cleaning chores between easy and hard, so everyone has an equal amount of work.

Nico is tired of being mistaken for her twin sister; Carl is upset when Nico breaks the Lint Dinosaur Monday rules and makes a Lint Monster instead.

Daniel learns the importance of sharing his feelings; Daniel pays attention to how many feelings he experiences in a day.

Jay and Lupe use wayfinding signs to track down Phoebe; Pete and Craig face an epic hoops battle on the courts.

Captain Elmo's solo mission to Jupiter is interrupted when his friends join and mess up his plan; Grover tries to fix the spaceship boosters.

It's Backwards Day in the Treeborhood; Cece, Carly and Clyde have fun with patterns.

Donkey's guitar goes missing just before the talent show; Duck Duck finally finds her family's treasure nest, but she is unable to open it.

Rosie puts on a concert when Tia is unable to get tickets to see her favorite singer; Rosie loses her first tooth, and prepares to welcome both the Tooth Fairy and the Tooth Mouse.

David Attenborough explores London's Natural History Museum and meets creatures from the past, brought to life by CGI, including a giant eagle and colossal snake.

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.

A traveling puppet show circa 1870; Yakama toy cradle and doll circa 1890; a 1993 Air Jordan sneaker display.

Learning what plants and trees are really about.

Experts search for seagrass, rescue a sea lion and store water underground.

The Cordell Bank National Marine Sanctuary, 50 miles northwest of San Francisco, is a hot spot for marine life.

As algal blooms increase in length and severity in Florida, scientists study their causes, impact, and how to stop them.

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.

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.

Telling the story of the 10th Mountain Division ski troopers and how they transformed skiing and championed the U.S. ski industry after World War II.

Recounting how several unsuccessful attempts were made to locate the Titanic; in the 1980s, Texan oil billionaire Jack Grimm funds an attempt to locate the ship.

Following the failed missions of billionaire Jack Grimm, scientist and explorer Robert Ballard uses the cover of U.S. Navy missions looking for lost nuclear submarines to find the wreck.

Investigators search for the identity of the captain of a "mystery ship" that turned away from Titanic the night it sank in 1912.