Scientists are using Henry David Thoreau’s detailed diaries to analyze the ebb and flow of the natural world. They conclude climate change has significantly altered the budding of wildflowers at Walden Pond and beyond.
Just 50 years ago, February 20, 1962 John Glenn became the first U.S. astronaut to orbit the earth.
Widespread natural gas leaks are putting people, plants and the planet at risk.
Environmental artist Christo envisions suspending miles of shimmering fabric over the Arkansas River. Opponents charge it's like hanging pornography in a church.
As the US prepares to leave Afghanistan, there is an ugly legacy of environmental costs of 30 years of war.
The beauty of Central Park lies in its carefully planned landscape and unique trees. One New Yorker and tree-lover has walked every inch of the park and mapped all 19,933 of its trees.
The Mayan Long Count Calendar is nearing the end of its 5125 year cycle. New age prophecies, based on the ancient calendar, warn the world will end when the cycle concludes in December 2012.
A quarter of a century after the world’s worst nuclear disaster, we revisit the place and the people lived and worked in the evacuation zone.
Alternative energy turns a relic of America's Industrial Revolution into one of the countries largest green projects.
Federal health officials say we have the safest food system in the world, yet there are nearly eighty million cases of food-borne illnesses annually in the United States. Critics blame the very attributes of our nation's agricultural industry that the res