"Numbering no more than a few thousand, tiny groups of intrepid humans began to move out of Africa, eventually dominating the planet. How did these early humans acquire the skills, technology, and talent to thrive in every environment on Earth? Take a global journey through the past, following the ancestors' footsteps out of Africa along a trail of scientific clues to help unravel the mystery of how humans got where they are." --

Caillou learns to recognize his limits after attempting to sled down the 'Big Hill'.

Physicist and cosmologist Stephen Hawking poses enduring scientific questions to teams of non-scientists to test their problem solving skills and summon their inner-genius, covering topics such as time travel, the existence of life on other planets, how the universe came to be, and the origins of life.

Discover the thrilling story of how people are made, from the moment of conception to the moment of birth 280 days later. Follow the gestation process, the most exquisite biological choreography found in nature. Using the latest research and advances in medicine, we can reveal this hidden world in forensic detail. Zeroing in on milestones along the road to creation; where critical events can change people's life.

"Join CBS News Travel Editor Peter Greenberg as he shares cutting-edge travel news, must-have information, and insider secrets on navigating the travel process, from need-to-know tips to improve the travel experience like how and when to book a hotel room, how to avoid nickel-and-dime fees, or how to speed through airport security." --

In 2013, a particularly massive chunk of ice and rock is hurtling towards the Atlantic Ocean. The object's size will fascinate billions and should create the space show of the century. Follow scientists on the trail of the once-in-lifetime comet ISON and explore the cultural obsession with these celestial visitors.

"John James Audubon's story is dramatic and surprising. He was not born in America, but saw more of the North American continent than virtually anyone alive. His growing apprehension about the destruction of nature became his prophecy. As an artist and naturalist his achievements were monumental. John James Audubon: Drawn from Nature creates a meaningful portrait of Art and Science in the first decades of the 19th century." --

Discover how researchers on the cutting edge of mind-control can implant, change, and even erase memories. On this thought-provoking journey into the mind, NOVA investigates the mysterious nature of how we remember.

Often called the mother of the modern environmental movement, Rachel Carson rocked the world in 1962 with her book Silent Spring, which warned the American public of the impact of pesticides on the environment and unleashed an extraordinary national debate about science and safety. At the center of that firestorm stood Ms. Carson, a strong, intensely private woman who balanced her love of the natural world and passion for writing with personal strife....

"Inducted into more music Halls of Fame than any female recording artist to date, Loretta Lynn (b. April 14, 1932) has earned four Grammy Awards, Kennedy Center Honors and a Presidential Medal of Freedom, and sold more than 45 million records worldwide. Still going strong after more than 50 years, "The Queen of Country Music" is now the subject of this new documentary Loretta Lynn: Still a Mountain Girl. With unprecedented access to Lynn, her family...