You're going to dig this ancient, rock-cut architecture
June 13, 2016, 5:31 a.m. by Catie Leary
From Petra to Mesa Verde, these monolithic marvels are a testament to the ingenuity of ancient civilizations.
Thailand shutters access to island paradise over tourism threats to environment
May 17, 2016, 3:15 p.m. by Michael d'Estries
Officials have taken the rare step of closing Koh Tachai island 'before the damage is beyond repair.'
Could Nevis be the first carbon-neutral island in the world?
March 27, 2016, 11 a.m. by Starre Vartan
The small island nation is making an impressive renewables push to fight climate change.
What are hoodoos? The science behind these surreal formations
March 25, 2016, 6:50 a.m. by Catie Leary
Learn how hoodoos are formed and the best places to see them.