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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.

Exploring the science and unexpected histories of "The Replacements," five animal and plant species that made allies of humans.

Exploring the modern city, including three species that thrive in that ecosystem.

A 1941 Rolls-Royce Wraith center caps and certificate; 1934 All-American basketball team autographs; a Maynard Dixon oil painting circa 1913.

Exploring the science and unexpected histories of "The Replacements," five animal and plant species that made allies of humans.

As the team prepares for a creature costume party, everyone starts to notice strange things happening around them.

Benny's toy penguin is swept away by melting snow, transforming a day of sledding into an urgent rescue mission.

Liana accidentally submits art that Stu made and feels guilty taking the credit for his work; Lyla and Luke perform an "Anansi" folktale puppet show.

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

Even though Mom Tiger is working, Daniel wants her to play with him.

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

On a hot day, Abby creates a snowman to keep her and Elmo cool; when they return from finding decorations, their snowman has vanished.

The Wombats program the "Toy Maker" when Mr. E's shipment is delayed; the Wombats track down a ruckus, discovering many noises along the way.

Donkey is nervous the first time she sleeps outside; Panda forgets his poetry notebook inside Donkey's messy windmill.

Iggy wants to see the garbage truck, but Rosie doesn't know how to get it to come to their house; Rosie attempts to bring nature inside.

Elinor and her friends volunteer to help Mr. Raccoon put up a sign for his bakery, but the sign keeps blowing away; it's Plant Day at school and when Elinor gets a cactus, she's a little disappointed at first.

Alma and Uncle Nestor get separated from the rest of the family on the subway; Alma and Junior are excited about their new neighbors.

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.

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

Even though Mom Tiger is working, Daniel wants her to play with him.

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

As the team prepares for a creature costume party, everyone starts to notice strange things happening around them.

Liana accidentally submits art that Stu made and feels guilty taking the credit for his work; Lyla and Luke perform an "Anansi" folktale puppet show.

Alma and Uncle Nestor get separated from the rest of the family on the subway; Alma and Junior are excited about their new neighbors.

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

Orli has taken on too many things at once, in addition to helping Orwell keep HQ running; The Oddness Monster needs to be watched.

Francine is upset she does not receive the Athlete of the Year Award; guest Michelle Kwan; Arthur gets a new babysitter.

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.

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 legacy of North Dakota's farm-boy-turned-television-star, Lawrence Welk.

Willie Nelson, Waylon Jennings, Johnny Cash and Kris Kristofferson perform their hits in this 1990 concert at the Nassau Coliseum; songs include "Big River," "Me and Bobby McGee" and "Always on My Mind.".

A 2016 concert celebrates Kris Kristofferson; performers include Dierks Bentley, Rosanne Cash, Eric Church, Emmylou Harris, Jamey Johnson, Alison Krauss, Lady A, Martina McBride, Reba McEntire, Willie Nelson and more.

Frankie Laine, Julius LaRosa, the Four Lads, the Four Freshmen and Herb Reed's Platters are a few of the musicians who perform their hits of the late 1950s and early '60s.