The incredible life of the 17-year-old peasant girl who donned a suit of armor, rode off to war, and saved France. Historians ponder the question of whether Joan was a national hero, an instrument of God, or simply a troubled but forceful young woman.

Nate meets an industrial designer to learn how she combines engineering and art to create functional yet sleek household faucets. Then Nate takes a ride on a rollercoaster to figure out how thrill ride engineers create awesome steel sculptures and unforgettable experiences.

Satellites track climate change, revealing accelerated shifts in Earth's oceans and ice caps. Data supports urgent concerns.

SOLAR DEVELOPMENTS, SUSTAINABLE FURNITURE, AND GREEN SCHOOL PRACTICES

INVESTIGATING AND TESTING A 13TH CENTURY ROCKET-POWERED TORPEDO.

Profile of the legendary White House reporter who broke ground for women in journalism and who has kept presidents on the defensive with her probing questions and coverage.

Friday, April 29th -- The whole world turned up and tuned in to see the wedding of commoner Kate Middleton to the world's most eligible bachelor, Prince William of Wales, but what they walked away talking about was Kate's gorgeous maid-of-honor, her sister Phillipa "Pippa" Middleton. And, while Pippa was seemingly introduced to the world that famous day in April, she'd actually been cultivating her image and socialite status for years. And now, Pippa has reached a new level of fame, one that is even trickier to navigate, but this ambitious young ingenue has been waiting her whole life for this day and is ready to take center stage.

At the height of her career, Grace Kelly traded in the glamour of Hollywood for a lavish lifestyle as the Princess of Monaco. Her remarkable story unfolds through film clips, home movies, and celebrity interviews.

The daring solo pilot was a symbol of freedom for women everywhere, an honored worldwide traveler, and a tragic heroine who lives on in the mythology of America.

Profile of the First Lady who disliked politics, but supported her husband Richard through the many crises of his turbulent career. Here is the real Pat Nixon--the perfect political wife who smiled in public and said nothing controversial but who liked to kick back with a cigarette and highball in private.

She is a Cinderella, of sorts: once a librarian, now First Lady. Interviews with Laura Bush, the President, and Bush family members and friends highlight this portrait. We go behind the public image to meet the real Laura Bush--the young woman involved in a fatal car accident, the new bride struggling to get pregnant, the reserved woman who agreed to support her husband in his public career, and now the polished national leader.

The incredible life of the 17-year-old peasant girl who donned a suit of armor, rode off to war, and saved France. Historians ponder the question of whether Joan was a national hero, an instrument of God, or simply a troubled but forceful young woman.

Chronicles the life of the early feminist who crusaded for equal pay, equal work, and women's suffrage, which led to the 19th Amendment to the Constitution. Also covers her union organizing work and her fight for the abolition of slavery prior to the Civil War.

Saga of the prim and proper Victorian lady who turned the American frontier upside down with her brilliant shooting and dazzling performances in Wild West shows.

Profile of the legendary White House reporter who broke ground for women in journalism and who has kept presidents on the defensive with her probing questions and coverage.

Friday, April 29th -- The whole world turned up and tuned in to see the wedding of commoner Kate Middleton to the world's most eligible bachelor, Prince William of Wales, but what they walked away talking about was Kate's gorgeous maid-of-honor, her sister Phillipa "Pippa" Middleton. And, while Pippa was seemingly introduced to the world that famous day in April, she'd actually been cultivating her image and socialite status for years. And now, Pippa has reached a new level of fame, one that is even trickier to navigate, but this ambitious young ingenue has been waiting her whole life for this day and is ready to take center stage.

At the height of her career, Grace Kelly traded in the glamour of Hollywood for a lavish lifestyle as the Princess of Monaco. Her remarkable story unfolds through film clips, home movies, and celebrity interviews.

The daring solo pilot was a symbol of freedom for women everywhere, an honored worldwide traveler, and a tragic heroine who lives on in the mythology of America.

Profile of the First Lady who disliked politics, but supported her husband Richard through the many crises of his turbulent career. Here is the real Pat Nixon--the perfect political wife who smiled in public and said nothing controversial but who liked to kick back with a cigarette and highball in private.

She is a Cinderella, of sorts: once a librarian, now First Lady. Interviews with Laura Bush, the President, and Bush family members and friends highlight this portrait. We go behind the public image to meet the real Laura Bush--the young woman involved in a fatal car accident, the new bride struggling to get pregnant, the reserved woman who agreed to support her husband in his public career, and now the polished national leader.

The incredible life of the 17-year-old peasant girl who donned a suit of armor, rode off to war, and saved France. Historians ponder the question of whether Joan was a national hero, an instrument of God, or simply a troubled but forceful young woman.

Chronicles the life of the early feminist who crusaded for equal pay, equal work, and women's suffrage, which led to the 19th Amendment to the Constitution. Also covers her union organizing work and her fight for the abolition of slavery prior to the Civil War.

Saga of the prim and proper Victorian lady who turned the American frontier upside down with her brilliant shooting and dazzling performances in Wild West shows.

Profile of the legendary White House reporter who broke ground for women in journalism and who has kept presidents on the defensive with her probing questions and coverage.

Friday, April 29th -- The whole world turned up and tuned in to see the wedding of commoner Kate Middleton to the world's most eligible bachelor, Prince William of Wales, but what they walked away talking about was Kate's gorgeous maid-of-honor, her sister Phillipa "Pippa" Middleton. And, while Pippa was seemingly introduced to the world that famous day in April, she'd actually been cultivating her image and socialite status for years. And now, Pippa has reached a new level of fame, one that is even trickier to navigate, but this ambitious young ingenue has been waiting her whole life for this day and is ready to take center stage.

At the height of her career, Grace Kelly traded in the glamour of Hollywood for a lavish lifestyle as the Princess of Monaco. Her remarkable story unfolds through film clips, home movies, and celebrity interviews.

The daring solo pilot was a symbol of freedom for women everywhere, an honored worldwide traveler, and a tragic heroine who lives on in the mythology of America.

Profile of the First Lady who disliked politics, but supported her husband Richard through the many crises of his turbulent career. Here is the real Pat Nixon--the perfect political wife who smiled in public and said nothing controversial but who liked to kick back with a cigarette and highball in private.

She is a Cinderella, of sorts: once a librarian, now First Lady. Interviews with Laura Bush, the President, and Bush family members and friends highlight this portrait. We go behind the public image to meet the real Laura Bush--the young woman involved in a fatal car accident, the new bride struggling to get pregnant, the reserved woman who agreed to support her husband in his public career, and now the polished national leader.