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The dry, red planet Mars was once a blue water world studded with active volcanoes and may have even had the ingredients to support life.

Jupiter's gravitational force made it a wrecking ball as it barreled through the early solar system, but it also helped shape life on Earth as it brought comets laden with water and possibly the asteroid that put an end to the dinosaurs.

Arthur doesn't like the new darker and scarier comic books; Arthur and Francine enter their pets in a video contest.

Ms. O develops bizarre side effects after being sprayed by a weird plant; a mysterious villain may bring Ms. O's old partner out of retirement.

Jay and Albie plan a surprise party for Bon Bon; Albie and Mila learn from an illustrator how to think creatively and make their own movie masterpiece.

Dot and Al announce the Hunters are spending Christmas in Nigeria, and Corky wonders if she can have a fun Christmas without snow.

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.

Carl blames Nico when his special crayon breaks and Nico blames Carl when his drawing rips; Lotta tries to learn to play the alto saxophone.

The children work together to create a dancing dragon; Mom Tiger helps the students decorate the classroom for Teacher Harriet's birthday.

Phoebe and Jay create a game show for Grandma; Phoebe and Jay must find the best way to spend the community coin jar money by taking a building-wide vote.

Cookie Monster gets tired from pushing his cart, so Abby uses magic to make the cart move on its own; Grover tries to deliver boxes.

The Wombats go on a quest to figure out all the elements that go into creating the perfect personal time routine; Zadie wants to make a really loud noise.

Donkey Hodie takes Cousin Hodie and Purple Panda on a road trip around Someplace Else, but the plan goes off course.

Rosie finally gets the courage to go into the Fun House at the carnival, but then finds out she doesn't have enough tickets; Rosie goes to the pet store to get something for Crystal's new bunny.

Elinor and her friends play Hide-and-Go-Seek but are unable to stay hidden from the Goat twins; an owl inspires Elinor's costume for Costume Day.

Alma puts together a care package for Granny Isa; Beto and Rafia are nervous to play each other in soccer.

Four kids feel like they don't belong on their first day of school until they learn that friendship and fun come from sharing who they are.

The unique food of New Orleans, including blackened fish with Creole spice and zucchini; history of how African American foods have permeated American culture and cooking; jambalaya.

Cast iron myths; cast iron care; cast iron steak; paper towel holders; roast butterflied chicken with rosemary and garlic.

El Chepe train is a wonder of Mexican engineering that took 100 years to build through the world's largest canyon region, Copper Canyon.

A Fern Isabel Coppedge oil; a Tiffany Studios mosaic glass inkwell; an 1844 presidential election political banner.

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

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

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

With the dawn of the Space Shuttle, the U.S. gains ground on Cold War rivals; a pioneering class of astronauts takes flight, but when an accident occurs, NASA are left reeling.

A 2002 patriotic celebration of America and pop oldies music, featuring artists from the rock, pop and doo-wop days of the 1950s to early mid-1960s.

When the Soviet Union falls, Russia welcomes U.S. astronauts to their space station, Mir, but cooperation between former Cold War enemies is threatened by a run of disasters onboard.