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Increasing understanding and mitigating the spread of disease, data collection has been an essential public health tool for centuries.

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.

Jamie Chung, Cyndi Lauper and Danny Trejo retrace the journeys of their immigrant ancestors.

Research into the ancestry of singer Lea Salonga and actress Amanda Seyfried reveals relatives who survived heart-wrenching ordeals.

President Trump's unprecedented challenges to the Federal Reserve and what it means for the economy; tracing the battle between Trump and the Fed as the central bank steers the economy through an increasingly precarious moment.

Professor Aaron Tang guides panelists in a debate of ethical dilemmas on a hypothetical election storyline.

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

Jamie Chung, Cyndi Lauper and Danny Trejo retrace the journeys of their immigrant ancestors.

Research into the ancestry of singer Lea Salonga and actress Amanda Seyfried reveals relatives who survived heart-wrenching ordeals.

President Trump's unprecedented challenges to the Federal Reserve and what it means for the economy; tracing the battle between Trump and the Fed as the central bank steers the economy through an increasingly precarious moment.

Professor Aaron Tang guides panelists in a debate of ethical dilemmas on a hypothetical election storyline.

Drying fresh flowers; bouquets, crafts and projects with dried and preserved flowers; creating a bouquet, garland and wreath with dried and preserved hydrangeas; a cocktail featuring lavender bitters.

Aerial view of Cappadocia; underground city; circumcision party; exploring troglodyte ghost towns; shopping for sheep; the modern capital of Ankara.

Modifying traditional asanas with variations of shoulderstand, plough and the standing forward bend.

A gentle workout to release tension in your body.

Martin and Chris pose a challenge to Koki and Aviva about who has the most challenging job.

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

The Loops play fun practical jokes on each other; Loops Lunch moves outside because of a blackout, but it causes many problems.

Carl's medium-sized fuchsia yo-yo goes missing from his collection; a rainy day changes Carl's pool day plans.

Daniel and Mom make a coconut swirl snack together; when a backyard campout is rained out, Jodi, Teddy and Leo find that they can still have a special night being together.

Phoebe and Jay use Miss Jean's field guide to identify their new butterfly friend; Phoebe gets courage to perform at the talent show.

After looking at the moon through Yasmine's telescope, Tamir, Elmo and Zoe pretend to be astronauts traveling to the moon.

The Treeborhood is alive with sound patterns; Zadie loses one of Louisa's toys.

Panda hopes to find a quiet way to show his love for the moon moths; Donkey helps Panda fix his spaceship.

Rosie and Javi's pirate adventure goes awry; Rosie has trouble choosing a job at the first Fun Club meeting.

Jamie Chung, Cyndi Lauper and Danny Trejo retrace the journeys of their immigrant ancestors.

Research into the ancestry of singer Lea Salonga and actress Amanda Seyfried reveals relatives who survived heart-wrenching ordeals.

Although heralded as a model minority, bold ambition leads Asian Americans to national political office as a culture-quake simmers beneath the surface.

A group of seniors attempts to break a skydiving world record; these "golden flyers" over the age of 60 jump out of planes at 10,000 feet and along the way, build camaraderie and spiritual connections transcending the limit of age.

A diverse group of 80-year-olds find meaning in their lives through their long careers and a wide range of occupational pursuits.

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.

Onsite extraction of fossils of an ichthyosaur, a fish lizard that ruled during the time of the dinosaurs, and a 3-D reconstruction of the creature; host David Attenborough.

Exploring the quantum universe.

Pioneers from Guatemala to Japan share space with wildlife and restore the way we coexist and cultivate among the trees.

The consequences of global warming on the oceans and the life they support.

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

Onsite extraction of fossils of an ichthyosaur, a fish lizard that ruled during the time of the dinosaurs, and a 3-D reconstruction of the creature; host David Attenborough.

Exploring the quantum universe.

Pioneers from Guatemala to Japan share space with wildlife and restore the way we coexist and cultivate among the trees.

The consequences of global warming on the oceans and the life they support.

The meanings of flowers and their colors; the Victorian method of sending a secret message through flowers; how flower color can influence one's mood; the meaning behind the color of roses; flower popsicles.

Touring four castles -- Chenonceau, Chambord, Cheverny and Villandry; feeding hunting dogs; local cuisine; a princely garden.

Wheel, sun and squatting pose increase circulation while sheetali pranayama cools the body down.

A workout to rebalance your body, liberate your shoulders and improve your overall posture.

Chris, Martin and Aviva need osprey creature powers to find keys that Jimmy dropped in the ocean.

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

Lyla gets a strike her first time bowling but gets frustrated when she realizes bowling isn't as easy as she thought it was; Lyla feels left out when Everett and Ale's friendship thrives.

Carl doesn't know what to do when Nico falls; Carl learns a new word -- shindig.

Daniel gets mad when he doesn't get a crayon box right away at the Crayon Factory.

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

While watching baby dragons for the first time, Abby, Elmo and crew join voices for a soothing bedtime bop to make sure the little beasties go to sleep.

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.

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

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.

Onsite extraction of fossils of an ichthyosaur, a fish lizard that ruled during the time of the dinosaurs, and a 3-D reconstruction of the creature; host David Attenborough.

The team returns to Okavango Delta to catch up with old friends; lionesses hunt nonstop to feed growing cubs; leopardess Xudum moves on, and the new mom, Lediba, steps into the spotlight; Pobe the cheetah returns with two cubs of her own.

With the dominant males gone, trouble looms as intruder lions close in on the Xudum pride's young cubs; leopard Lediba searches for her missing cub after a tense encounter; Pobe the cheetah must defend her family's food from bigger cats.

Green Bay Packers salesman's sample championship rings; Barbie dolls and wardrobe circa 1960; a 1977 Keith Haring Bean Salad lithograph.

The 1970s Love Canal disaster and how the battle for justice, led mostly by women, created the basis for the federal Superfund program.

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.

Stories about the people, places and events in Colorado's history.

Reflecting on how Bruce Lee revolutionized Hollywood and understanding the man behind the myth -- a dedicated artist, martial arts philosopher and a fighter against racial injustice.

Exploring China's history, beginning at a festival devoted to ancient gods; China's first emperor; traveling the Silk Road; Tang dynasty.

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

Stories about the people, places and events in Colorado's history.

Reflecting on how Bruce Lee revolutionized Hollywood and understanding the man behind the myth -- a dedicated artist, martial arts philosopher and a fighter against racial injustice.

Exploring China's history, beginning at a festival devoted to ancient gods; China's first emperor; traveling the Silk Road; Tang dynasty.

The Spirit of Aloha; a visit to a vintage Aloha store; chef Ed Kenney shares a dish with an unusual and rare ingredient.

Exploring Versailles; Vaux-le-Vicomte; Fontainebleau; the glass and statuary of Chartres cathedral.

Regular practice of asanas helps to stretch hamstrings.

Liberating joints and muscles in the neck and shoulders.

Chris and Martin search for an obscure rain forest creature.

The Hunters learn how temperatures can affect outdoor plants and gardens.

After feeling left out, Luke decides to switch places with Stu; the Loops kids throw a surprise party for their parents.

Dylan is excited to play his new game, but things take a turn when the game pieces fall into a floor vent; Carl is determined to get into the FuzzyWorld Book of Records.

Daniel and Miss Elaina don't want to stop playing when it is time for Quiet Time at school; Daniel finds something that will help him rest.

Phoebe and Jay use a checklist to guide them through their tasks; Jay creates his first comic book and learns about the importance of page order.

Abby, Big Bird and Cookie Monster play against Gabrielle, Zoe and Elmo in I Wonder If We Can Use This, a game where they figure out if items can be used for something.

Devonte J. Squirrel moves to the Treeborhood; Devonte and the Wombats create a machine that makes ice cream using a bike.

Donkey wonders if she and her cousin can have fun together since they don't like doing the same things anymore; Panda thinks about how he is different from other pandas.

Things get out of control when Rosie starts a pet-sitting business; Rosie plays with a rock from Javi's rock collection.

Exploring the quantum universe.

Pioneers from Guatemala to Japan share space with wildlife and restore the way we coexist and cultivate among the trees.

The consequences of global warming on the oceans and the life they support.

A Cartier Art Deco Tutti Frutti clutch circa 1925; a Carl Kauba cowboy bronze circa 1900; a Sumerian cuneiform tablet.

Three veterans who were once in charge of transforming new recruits into service men and women talk about the transformation process and its impact on their lives after action.

Veterans Dr. Sam Babu, Mazin Mozan and Nick Paz discuss their personal connection to citizenship and its impact on military service.

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.

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

Margaret Hoover leads interviews and debates.

Based on the 1935 movie musical starring Fred Astaire and Ginger Rogers, "Top Hat" features dazzling choreography and period sets, with an Irving Berlin score featuring "Cheek to Cheek," "Let's Face the Music and Dance" and "Puttin' on the Ritz.".

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.

Based on the 1935 movie musical starring Fred Astaire and Ginger Rogers, "Top Hat" features dazzling choreography and period sets, with an Irving Berlin score featuring "Cheek to Cheek," "Let's Face the Music and Dance" and "Puttin' on the Ritz.".

Americana duo Larry Campbell and Teresa Williams.

Chris, Martin and Aviva need osprey creature powers to find keys that Jimmy dropped in the ocean.

Zadie earns Junior EMT status and follows Ellie on her EMT calls; the Wombats bake a boat-shaped birthday cake.

Alma helps Mr. Ramirez figure out what to do when he lets too many cats into his shoe shop; Alma tries to convince Howard to play stickball.

Olive and Otto investigate why things are disappearing all around town; one of the four Debbies from Debbie's Pizzeria disappears.

Mountain reflections shine in a lake below on a clear, windless day.

Building strip set skills, including proper cutting and pressing, popped intersections and nested seams; color theory; how gradation of fabrics creates an illusion of seamless shifting values.

How to"quilt" paper creations; using a new non-woven substrate.

Basic serger skills; adding puffing or textures; serging on ribbon trim.

Beginning a pose from the back body helps integrate the strength of the front body; Snowbird and Boat poses.

How Italian cooking traditions are passed down to newer generations.

Robert Del Grande; beef fillets in chili sauce; seared sea scallops; corn pudding.

Asian creatives who work in Berlin who cook, perform, sing and dance -- sometimes all at once.

Calabrian panzanella; Burmese tomato salad with shallots and peanuts; tomato conserva; upside-down tomato tart with Parmesan pastry.

Grilled hilltribe chicken with kua txob; the difference between fondue and fonduta; refreshing tomatoes with fontina sauce and cornichon dressing.

A flavorful tandoori salmon; favorite kitchen gadgets under $15; a tasting of yogurt; broiled smashed zucchini with garlicky yogurt.

Exploring Sonora's coast on the Sea of Cortez; shellfish on the beach; Mariscos El Rey restaurant; seafood stand owner known as "The Surgeon"; seafood-loaded recipes.

Grilled corn, zucchini and tomato salad; spicy lobster linguine.

Indigenous and early American food traditions; clamming on Cape Cod; the secret of Red's Eats' famous lobster roll.

A guided tour of Zurich; Museum Fur Gestaltung; Felsenegg cable car ride; Mount Uetliberg; Hiltl, the oldest vegetarian restaurant in the world; Yonex Badminton Halle.

The Kindland Movement of Cleveland brings communities together to highlight the importance of kindness.

Early spring in Joshua Tree National Park.

Traveling the Natchez Trace from Tupelo to Natchez, exploring scenic Parkway views, historic towns and local culture, including the charms of Ridgeland and and Natchez's storied streets.

Dubrovnik on the Adriatic Sea coast; Mostar, Bosnia and Herzegovina; Montenegro's Bay of Kotor.

Touring a new attic apartment ADU in Dorchester, Mass.; plumbing update.

Replacing vintage ceramic toothbrush and soap holders; repairing a water-damaged ceiling crack matching the original swirl texture.

Science, health, technology and environment experts and professionals address issues such as artificial intelligence, medicine and climate science.

The stage adaptation of Jane's book endures numerous snafus before opening night.

A body is found in a local mill.

Mervin and the team investigate the dark side of online dating when a man is shot dead at his villa; a new colleague makes an impression for all the wrong reasons.

Barnaby is called to investigate when a body is found in a relish factory.