Discover America's ultimate parks
June 13, 2010, 8 p.m. by National Geographic
The country's national parks offer everything from glaciers to geysers.
A green 'We Are the World'?
April 28, 2010, 1:59 p.m.
Using green initiatives including solar power, wind energy and biofuel technology, more than 250 Georgia music industry professionals and artists wrote, produced and performed 'Mother Earth,' an anthem for U.S. parks movement Pack the Park.
Thirsty koala seeks help from bikers in South Australia
Australian fires reveal ancient water system built long before the pyramids
4 ways exercise is good for your brain
What gray hair says about your health
Researchers develop a new way to remove greenhouse gases from the atmosphere
Arctic fox astounds scientists by walking 2,100 miles in 76 days