goes Green for Earth Week 2015 brought to you by Rodale’s Organic Life
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WATCH: Surveillance Shows Yard and Dogs Rocked Violently in Nepal Earthquake
WATCH: Hiker Captures Dramatic Moment of Calbuco's Eruption
SPONSORED: Can Climate Change Affect How You're Feeling?
Throughout the planet’s 4.5-billion-year history, the Earth has undergone amazing and dramatic changes. Even today, the planet is in a constant state of flux.
From Patagonia to China, these natural and man-made caves are unbelievable.