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Actresses Debra Messing and Melanie Lynskey explore the stories of their ancestors whose bold decisions reshaped their families.

Thoreau returns to society, taking on roles as surveyor, scientist and abolitionist, and makes two more Maine trips; Thoreau writes with renewed energy as he faces a lifelong illness.

Amid new attacks by the U.S. and Israel, investigating Iran's nuclear program; an updated and expanded investigation, drawing on reporting in Iran and in-depth forensic analysis with The Washington Post, Evident Media, and Bellingcat.

An inside look at protests that have shaken Iran since the death of a young woman in police custody.

The travel adviser explores the cultural heritage of the country once known as Persia.

Roberto Clemente encourages Xavier, Yadina and Brad to help however they can when the museum water fountain breaks on a hot day; Kristi Yamaguchi shows Yadina that it is ok to ask for help when learning how to roller skate.

Brain, D.W. and Bud explore the inner workings of the brain; Brain may finally see a meteor shower.

The Wild Kratts are busy coloring eggs for Easter; the bros think an adventure can be to go find the real Easter Bunny; Chris thinks it's the snowshoe hare, while Martin thinks it's the jackrabbit.

Rae takes on the job of photographer, learning to focus to capture perfect shots of a stunt motorcycle rider; librarian Dev discovers that grouping is a helpful strategy to keep books organized.

The Hunters try to help an injured bird so it can join its friends migrating south for the winter.

Carl loves the new sweater his Pop Pop knit him, but it feels itchy when he wears it; Carl is nervous about his new school bus stop.

Daniel meets a new friend, Max, who is autistic; Daniel and his friends help make Max more comfortable at Chime Time.

Phoebe plans a birthday surprise for Grandma; Phoebe and Jay must tend to the bell pepper in the garden.

Tango loses focus when Elmo tries to teach him a new trick.

Zadie helps Malik design a faster route to bring ice cream to a sick Sammy; Zadie tries to host a fun campout.

Duck Duck can't figure out how to fly Harriett's new Swoop-a-rino; Donkey takes Duck Duck on an adventure.

Rosie tries to send Abuela a birthday party in the mail; Rosie tries to send Gatita in the mail.

Elinor learns how webbed feet help ducks and other animals get around in the water; Elinor and Olive plan a camping breakfast for Elinor's dad's birthday.

Trini is determined to learn an ice skating move; Tooey and his brothers use tracking skills to find their dad in the forest.

A wedding dress circa 1798; a 1912 Ivan Khlebnikov jewelry casket; a George William Sotter oil.

Actresses Debra Messing and Melanie Lynskey explore the stories of their ancestors whose bold decisions reshaped their families.

Henry David Thoreau pursues a career as an author, retreating to a cabin in the woods to live simply and write.

Thoreau finds solace in nature and writes two books at Walden Pond; over his two year stay, an expedition to Maine and an act of civil disobediance protesting slavery reshape his idea of freedom.

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

Presenting a round-up of the most recent news and developments from across the world.

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

From snowy owls in the high Arctic to honey buzzards raiding hornet nests in Taiwan, a look at the extreme ways in which raptors conquer the toughest habitats on Earth.

Understanding how the brain shapes reality, including the tricks and shortcuts the brain takes to keep a person alive; with neuroscientist Heather Berlin.

Four people on four continents face environmental change driven by climate change; as resources grow scarce, they witness shifts in wildlife behavior.

Coverage of Minnesota's legislative and political issues.

The first Black female principal dancer at American Ballet Theatre, Misty Copeland opens up about the obstacles she overcame to make history in ballet.

Actresses Debra Messing and Melanie Lynskey explore the stories of their ancestors whose bold decisions reshaped their families.