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Molly uses Indigenous knowledge to spot a storm.

Edmund Hillary explains to Xavier that even the most courageous adventurers ask for help when they need it; Yadina prepares for a special birthday performance with the help of Celia Cruz.

In Canada, a baby turtle ventures through a forest in search of the lake where she will spend the next 50 years; a young bush baby in South Africa searches for a new home.

Tommy and Charlie create a cathedral ceiling; Mark breaks through the foundation to make space for mechanicals; Kevin learns about sun tunnels, and Richard creates a plan for cooling.

The latest news from health journals and research institutions.

Many conditions can cause symptoms like gas, pain, constipation, fatigue and bloating. Knowing what's simply annoying, and what could be a red flag.

Emerging research on how these medications may influence appetite, regulate diabetes, and promote heart health.

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.

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.

Chef Michelle Bernstein hears diner's reviews of restaurants.

A World War II WASP archive; a fire helmet and fire parade hat; a 1956-1968 Al Oerter Olympic collection.

Lewis M. Rutherford lunar photographs from 1865; a Patek Philippe & Tiffany platinum pocket watch circa 1910; Lynne Drexler oil paintings.

Kalief Browder's legacy expands via the poetry of his mother, Venida, in a poetic journey revealing how an individual's life and afterlife can transcend boundaries to ignite change.

How climate change activists are created and how action becomes the taproot of hope.

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

When a monk is found dead in a chapel kneeling in prayer, Patience and Frankie dig into the monastery's secrets.

As Alphy seeks redemption, Geordie's investigation into a local crook ignites a high-stakes siege; courage, love and sacrifice are pushed to their limits.

Tensions arise as Downton Abbey hosts a lavish Christmas party.

A Cuban family adjusts to life in the United States.

Cluny Museum; midnight ride in a classic car; stained-glass in Sainte-Chapelle; Père Lachaise Cemetery; Parisian cafés.

D.W. meets a cool 13-year-old girl; Buster switches bodies with Mr. Ratburn for a day and learns how hard it is to be a teacher.

During the town of Trifle's 100-year anniversary party, Ozzie and Onom must stop Tracey Trifler from covering it in trifle; Osric and Omni try to stop a Roman gladiator from causing ancient oddness.

The Kratt brothers use rattlesnake powers to find rare tellurium crystal.

The Hunter kids head to the state park to learn why leaves change color.

Lyla and Luke clean their room with help from Stu; Stu learns how to play hide-and-seek.

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.

Miss Elaina makes bandages that look like her skin color; Chrissie and her friends build a playground ramp, so Chrissie can climb to the top of the slide, too.

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

Big Bird is meeting Snuffy at Hooper's for lunch, and everyone decides to surprise him with a Snuffy-sized sandwich named after him, the Snuffwich.

It's all-hands on deck when Zadie and Malik retrace their steps to locate Zeke's beloved stuffy; when Zadie messes up Mr. E's shell garden, the key to fixing the pattern is JunJun's song.

Jeff Mouse, Donkey and Panda seek a hiding moth; Donkey makes up a song while she waits for Turtle-Lou to deliver her guitar.

Rosie and Javi transport a watermelon to the park for the family picnic; Rosie builds a dino cave for Iggy.

Elinor and her dad learn how to make their own chocolate; after accidentally breaking a jade plant, the kids learn how the plant grows.

Alma and her friends judge a Best Bronx food truck contest; Alma and Junior are excited to play restaurant in their backyard, until Howard opens a competing restaurant.

Molly is excited to show visitors around Qyah, but they don't think she is "Native enough" for the job; Tooey's family throws a special celebration to honor his first catch.

Catherine the Great eases Brad's fears about going to day camp without his best friends; Yadina is unsure about bringing an old quilt for show and tell, but artist Tomioka Tessai helps her realize the best items are ones connected to family.

NASA's New Horizons probe captures the first-ever detailed images of the icy world of Pluto.

Mark McCullough matches new stone to the old on the porch; heath buries electrical underground; Kevin, Molly and kitchen designer Michele look for design inspiration; Tommy creates a barrel ceiling.

As a young mother of two boys, Gina Hollenbeck maintains a positive outlook despite her stage 4 lung cancer diagnosis.

The risks of mixing prescription drugs, over-the-counter medications, and supplements.

Breast cancer experts and patients discuss new guidelines for early detection and innovative ways to make treating the condition more convenient.

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.

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.

Filmmakers reflect on their personal approaches to telling meaningful documentary stories. "Dirt Therapy", "Querido Pequeño Haiti" (Dear Little Haiti) and "El Soldador" (The Welder) are featured.

Mapping the roots of actress Lizzy Caplan and comic Hasan Minhaj, moving from shtetls in Eastern Europe to farmlands in northern India.

The arrival of the International Space Station promises a new era of cooperation in space.

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.

The history of the rocket, from its origin in ancient China to its use as a weapon of war; how adding hydrogen allowed rockets to carry astronauts to the moon.

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

A World War II WASP archive; a fire helmet and fire parade hat; a 1956-1968 Al Oerter Olympic collection.

Lewis M. Rutherford lunar photographs from 1865; a Patek Philippe & Tiffany platinum pocket watch circa 1910; Lynne Drexler oil paintings.

Kalief Browder's legacy expands via the poetry of his mother, Venida, in a poetic journey revealing how an individual's life and afterlife can transcend boundaries to ignite change.

How climate change activists are created and how action becomes the taproot of hope.

A Cuban family adjusts to life in the United States.

Hiking through the Cumbria Lake District; cricket; hiking Hadrian's Wall; Durham Cathedral.

The tree house collapses; Arthur's chorus group prepares for their performance.

Olive and Otto try to figure out why symmetrical objects were vandalized; objects and people disappear inside an Italian restaurant.

Martin and Chris try to stop robotic parrotfish from collecting coral.

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

Lyla trains Stu to help at the diner; Stu learns how to ride a scooter.

Carl and his friends clean up the Fuzzytown Park; Carl accidentally breaks the birthday present Sheldon planned to give his mom.

Jodi's asthma makes it hard for her to run around with her friends during a game of Splat Ball; Daniel feels left out when there's no room for him to play at the xylophone.

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

Elmo tries to win a race without eating his sandwich, but learns that eating healthy food will give him energy; Cookie Monster tries to eat the sandwich for himself.

Zeke and Louise plan to build a house for Snout; Kaya hopes to make a video once JunJun conquers his on-camera jitters.

Donkey tries to act like a bird at Duck Duck's bird party, but she does not enjoy herself; Grampy and Donkey miss Gregory while he is away at camp.

Rosie learns about a surprise for a sister, and tries to find out who that sister is; Rosie looks for someone to be her twin.

Ari tries to be quiet, so his sister can take a nap, but a woodpecker keeps making noise outside; the kids learn that all animals need some sort of rest to regain energy and stay healthy.

Alma and André help Junior write a story; Alma and Eddie surprise Nestor and Gloria.

Molly learns how to make offerings, hoping to stop a volcano from erupting.

Gwen Ifill shows Yadina that asking questions is a great way to get information; Matthew Henson shows Xavier and Brad that they can learn from each other.

A World War II WASP archive; a fire helmet and fire parade hat; a 1956-1968 Al Oerter Olympic collection.

Rounded-top windows are installed; easy-install roof shingles go down; Roger takes Kevin fishing; Tommy adds a diamond shingle siding detail; radiant heat goes in somewhere unexpected: the ceiling.

The latest news from health journals and research institutions.

Tips to help protect your furry family members from dangerous foods and decorations to stress-free holiday routines.

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.

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.

Scientists work to restore the seagrass that Florida's manatees depend on, while managers take the unprecedented measure of feeding the animals in the meantime.

A Formosan pangolin searches for a mate in a protected forest in Taiwan; a family of golden-headed lion tamarins travel to a strange new world in Brazil's Atlantic Forest.

New Horizons prepares to fly by an object known as MU69 on Jan. 1, 2019, which is expected to be the most distant flyby in NASA's history.

The arrival of the International Space Station promises a new era of cooperation in space.

Tips on foods that might improve your libido. Busting a common myth about oral pleasure.

Les Stroud is marooned on Costa Rica's Osa Peninsula.

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