In 1970, the same year as "Bell Bottom Blues" hit the charts, bell-bottomed greens thronged the first Earth Day events, where they learned, chanted, sweeped—and even littered.
From not-so-humble beginnings in 1970, when 20 million participated, Earth Day has grown into a global tradition. Find out when it is, how it started, how it's evolved, and what you can do.
An undersea cleaning party and the world's largest baked alaska join the ranks of oddball events that have been held on Earth Days past to draw attention to environmental causes.
Lead is causing clouds in odd conditions, potentially changing weather patterns and fighting global warming, say scientists who've "bottled" clouds and even grown their own.
Conservation photographers have documented the animals along the 1,950-mile border—and how it may be altered by the construction of the new U.S.-Mexico border fence.
Pedestrian-friendly boulevards, suburbs lush with rooftop gardens, and a central train hub are among proposals to restructure Paris to be the most environmentally sustainable city in the world.
From a reported 270,000 sharks fished daily to 106,000 cans of soda consumed every 30 seconds, brain-boggling measures of human consumption have been made visual--just in time for Earth Day.
Deliberately introduced to hunt beetles, invasive cane toad populations have exploded in Australia. Now scientists propose attacking the alien species with ants that feast on cane toad flesh.Video.
Race fans can cheer on their favorite leatherback sea turtles during the online "instant replay" of the animals' roughly 3,700-mile (6,000-kilometer) migration.
Antarctica's gushing, rust-stained Blood Falls contains evidence that microbes have survived deep under ice for perhaps millions of years, a new study says.
Odd growth patterns in ancient reefs at a Mexican theme park confirm that sea levels rose rapidly about 121,000 years ago, according to a controversial new study.
Doctors found a nearly two-inch (five-centimeter) fir tree growing inside a man's lung when they operated for a suspected tumor, Russian media are reporting. Video.
Mount Everest has been the scene of many triumphs and tragedies. The formidable challenges presented by climbing into thin air and frigid temperatures have been fodder for many compelling stories of bravery, determination, and failure.
Lightning crackled through an Alaska volcano's giant ash cloud, and an amateur photographer caught its fleeting fury. Meanwhile, scientists hope to solve a mystery with new "maps" of lightning inside the cloud.
