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Engineering feats that made modern civilization possible, from the connection of roads and bridges to rail networks and a continent-wide freeway system.

Transforming 37 acres of subtropical quarry into a subzero ski resort.

How craft is intertwined with the defining principles of the U.S.; featuring Robert L. Lynch, Sammy Little, Harvey Pratt and Eudorah Moore, as well as the Smithsonian Institution museums, the Veterans History Project and Berea College Student Craft.

Miss America Pageant trophies from 1921 and 1923; a 1962 Amazing Fantasy #15 introducing Spider-Man; 1910-1013 Turkey Red baseball cards.

A Disney Carrier gouache painting circa 1942; a pearl, diamond and platinum brooch; a William H. Johnson oil circa 1928.

D.W. tells her friends she is a fantastic skater, but she really is not; Muffy tries to prove to her friends that she is not spoiled.

Orla rushes through constructing a portal without reading the instructions; Omar, Oswald and Opal end up stuck in the 17th dimension; Oswald finally lands an interview on a famous podcast to talk about the new Mobile Unit van.

Chris and Martin challenge the gang to a new creature game when Aviva reveals her new Fishmobile invention.

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.

Liana and Lyla put together a puzzle with more than 1,000 pieces; Lyla and Luke construct a train using household materials.

Carl's favorite sour pickle scratch-n-sniff sticker loses its smell; Carl notices that his baby blanket, Knit-Knit, has a hole in it.

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 set a new record for the longest paper airplane fight; Phoebe and Jay learn how to build a stable pillow fort.

Big Bird and a cast of characters including the likes of Bert and Ernie, teach children numbers, colors and the alphabet.

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

Duck Duck enjoys "me time" at the beach; the pals like different things at Donkey's sleepover.

Rosie tries to be a reporter but has trouble finding things that are newsworthy; Rosie and Jun believe there is a jalapeno giant on the loose.

The kids take a field trip to a cloud forest and learn that clouds have water in them; the kids learn how crayons are made.

Alma and her family spend the day saying yes to everything; Alma helps Junior and Emi test a hypothesis.

Molly makes Grandpa Nat's secret nivagi recipe for the Qyah Ice Cream Competition; Molly helps Nina and Dr. Antigone band baby cranes.

Xavier learns that he is a special person just the way he is after he has a playdate with Fred Rogers.

Controlled breathing exercises; tapping and patting to warm up for a tai chi segment.

Motel Safari keeps the spirit of Route 66 alive with mid-century modern architecture, themed rooms and neon signs; the Santa Rosa Route 66 Car Museum; Santa Fe; the Man's Hat Shop; Grants, N.M.

Rain brings much needed relief from the heat to animals and people in the Outback.

Lionesses teach their cubs how to survive by showing them how to tackle giant buffalo; burrowing owls provide an underground nest for their chicks and mimic rattlesnakes' sound to protect them.

Wildlife cameraman Colin Stafford-Johnson explores Ireland's west coast and wildlife, including humpback whales, eagles, salmon and red deer stags.

A regular panel of guests from across the political spectrum discuss the biggest international stories of the day.

A detailed look into news stories from around the world from the BBC news desk in Washington, D.C.

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

Behind-the-scenes footage and candid on-location interviews with David Attenborough, and a look at his life from his boyhood days as a fossil hunter to his many years on the road.

A woman finds herself on a transformative journey as she nurtures wounded hummingbirds amid the glamour of Hollywood.

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

From Africa to Sri Lanka to Iceland, animal babies learn the most basic tools for survival during the first three months of life.

Baby animals face new challenges as they learn how to get around on their own, from searching for food to surviving in harsh environments.

Baby animals approach the end of their first year of life, branching away from their mothers and exploring the world on their own.

Original American monuments and the stories behind American favorites, from the Vietnam Veterans Memorial to Confederate soldier monuments.

Engineering feats that made modern civilization possible, from the connection of roads and bridges to rail networks and a continent-wide freeway system.

The road to war with Iran, the U.S. and Israeli roles, and the stakes for the region; an updated presentation, tracing Benjamin Netanyahu's long campaign to defeat Iran and his relations with the U.S. over peace and the regime's nuclear ambitions.

Francine suspects Ladonna is leaking secret team info when Ladonna becomes friends with a new soccer player; the city council votes to close Elwood City Library.

On the way to deliver a baby blob to The Big O in London, the Mobile Unit van runs out of fuel.

The Wild Kratts team travels across the world to name all the baby animals.

The Hunters search for a way to monitor the weather after they lose power during a thunderstorm.

Lyla struggles to sleep and tries to figure out what is wrong with her sleep routine; Lyla tries to do her own hairstyle.

When Nico teases Carl about bikes being for babies, he sets out to prove Nico wrong; Carl and his Fuzzytown friends can't wait to build a tree fort, but Carl has a hard time working as a team.

Daniel learns the importance of keeping the needs of others in mind; Daniel wants to be loud, but Margaret needs to sleep.

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

Big Bird and a cast of characters including the likes of Bert and Ernie, teach children numbers, colors and the alphabet.

Malik makes Snout less stinky; the Wombats and their friends make a special thank-you treat for Super.

Duck Duck learns how to fix her broken bookcase; Donkey welcomes Greeble the Treeble to Someplace Else.

Rosie, Javi and Uncle Steve use landmarks to get to Calvin's bakery; Rosie, Iggy and Javi lose their Easter eggs.

The kids make their own instruments so they can participate in Señor Tapir's concert; when Elinor's dad falls asleep during a campout, the kids use flashlights to communicate to each other.

Alma learns that practice makes perfect; Alma takes being Junior's "super sister" too far.

Molly plants fireweed in hopes of attracting a rare hummingbird; she must handle a surprise shipment when she organizes the Trading Post in preparation for winter.

Brad learns that asking questions can help him feel less afraid; overcoming a challenge makes Yadina feel proud.

An energetic workout with upbeat music and playful movement patterns; a gentle stretch segment focuses on detailed movements and attention to technique.

Carrie Morey to discuss her book Callie's Biscuits & Southern Traditions: Heirloom Recipes from Our Family Kitchen. Holly learns about making biscuits and what it takes to balance business, motherhood, and life.

The diverse humans and creatures inhabiting the Kimberley region of Western Australia.

California's wildlife adjusts to a world where drought, dams and fire pose dire threats to an ecosystem connected by rivers on land, in the air and in the sea.

California's wild creatures on the land and sea include blue whales and burrowing owls.

A regular panel of guests from across the political spectrum discuss the biggest international stories of the day.

A detailed look into news stories from around the world from the BBC news desk in Washington, D.C.

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

The Grammy award-winning superstar performs pop hits and Broadway favorites at her final concert in Las Vegas on New Year's Eve 1999.

A reconstruction of Queen Victoria and Prince Albert's royal wedding, including the wedding breakfast.

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

Re-ducting the house to make the system more efficient; demolishing the third-floor ceiling for the new insulation; installing a double-hung window in the dining room.

Common types of caulks and sealants; installing a garbage disposal with an air switch controller; building a children's dress-up closet.

Reconstructing the royal wedding of Queen Victoria and Prince Albert, including the stories behind the dress, food and music.

A reconstruction of Queen Victoria and Prince Albert's royal wedding, including the wedding breakfast.

From Africa to Sri Lanka to Iceland, animal babies learn the most basic tools for survival during the first three months of life.

Baby animals face new challenges as they learn how to get around on their own, from searching for food to surviving in harsh environments.

Baby animals approach the end of their first year of life, branching away from their mothers and exploring the world on their own.

A snake gets lost in Arthur's house in "Hide and Snake"; Muffy and Francine grow apart in "Muffy's New Best Friend.".

Omar has plans to surprise Orla with a 500th birthday party; the team accidentally gets locked out of its van.

The Wild Kratts discover a group of sifaka lemurs in Madagascar.

It's an exciting day for Lily and her family when they move into their new house.

Lyla and her siblings figure out a new morning routine so they won't miss the bus again; Lyla wants to learn a popular clap and dance sequence -- the Carrot Cake dance.

Forrest makes too many plans on the same day; Carl and Arugula build an epic marble run but fail to get the marble to run.

Daniel gets upset when Dad interrupts their playtime so he can care for baby Margaret; Daniel is upset when Prince Wednesday wants to play with the baby instead of him.

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

Big Bird and a cast of characters including the likes of Bert and Ernie, teach children numbers, colors and the alphabet.

Measuring helps the Wombats make a new hat for Ellie; the Wombats clean up a big mess.

Bob Dog has trouble playing Purple Putt-Putt by the rules; the pals try outfits from Harriett's invention.

Rosie accidentally gives away her doll Lele on Donating Day; Rosie and Galita volunteer for Seniors Day at the Nature Center.

Junior Ranger Elinor and Ranger Rabbit's favorite forest spot is ruined by a fire; Ari is upset because Miri gets all the attention.

Alma tells on Emi when she's doing something dangerous; Alma's friends won't try Aaron and Lucas' snacks.

When one of Connie's prized turkeys goes missing on Molly and Tooey's watch, it's up to them to track it down; Molly, Tooey and Trini decide to build their own sailboat and voyage to distant waters.

George Washington shows Yadina how to be the best Nature Troop leader; Susan B. Anthony helps Brad show his friends that everyone should have a vote.

A special warm up for the back; exercises for finger dexterity and strength; using a resistance band to strengthen core and postural muscles.

Heirloom Piedmontese cow; Double L Processing; gourmet compound butter; mushroom twice baked potatoes; French skillet filet mignon.

The Outback comes to life during the dry season -- turtles lay eggs, cattle get ready for rodeos, athletes dive for pearls and a mother to marsupials sets her babies free.

Exploring ancient Istanbul, the crossroads of Europe and Asia.

The story of Fenway Park, home of the Boston Red Sox, and the city's loyalty to its team and love for its ballpark.

A detailed look into news stories from around the world from the BBC news desk in Washington, D.C.

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

Exploring the life and legacy of lawyer and civil rights leader Thurgood Marshall, the first Black justice on the U.S. Supreme Court.

Following on the heels of his "MTV Unplugged" album, Ricky Martin performs in an August 2007 concert from Puerto Rico that includes "She's All I Ever Had/Bella," "Livin' La Vida Loca" and "The Cup of Life.".

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

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

Margaret Hoover leads interviews and debates.