The Earth's climate has a long history of drastic fluctuation. From ice ages to long periods of warmth, there are natural occurrences such as volcanic eruptions and changes in the Sun's intensity that affect the climate. More recently, there is wide speculation that activities associated with the Industrial revolution have altered the atmosphere and have negatively affected the climate. This program demonstrates how scientists measure, study and research...

"An exploration of humanity's relationship with ice since the dawn of civilization, Of Ice and Men reminds us that only by understanding this unique substance can we save the ice on our planet--and perhaps ourselves. Ice tells a story. It writes it in rock. It lays it down, snowfall by snowfall at the ends of the earth where we may read it like the rings on a tree. It tells our planet's geological and climatological tale. Ice tells another story...

Fast forward to the year 2050.... Will it be a world of sharp, unpredictable climate swings, devastating mass extinctions of plants and animals, chronic shortages of water, and unparalleled human poverty and hunger? Or will it be a world where nature's biological treasures are protected, all children get to attend school, and basic human needs are satisfied? This two-part NOVA special explores the possibility that we still have the power -- and a...

This is a feel good story out of Africa. For more than 20 years, an amazing permaculture project has been working in Zimbabwe. Where once the people of the Chikukwa villages suffered hunger, malnutrition and high rates of disease, this community of seven thousand has turned its fortunes around. During this period they have built what is probably the biggest continuous permaculture site in the world today. Complementing permaculture strategies, they...

Darwin's Brave New World is the story of how four young voyagers to the Southern Hemisphere, Charles Darwin, Joseph Hooker, Thomas Huxley and Alfred Russel Wallace, revolutionized science and gave birth to an extraordinary theory about the evolution of life on earth. Darwin's voyage to the Southern Hemisphere in the 1830s changed him from a directionless rich kid bound for a career in the Church, into one of the most incendiary thinkers of our age....