When scientist Mike Bergin traveled to India, he noticed something interesting - the snowy marble exterior of the Taj Mahal had become brown. The deterioration of this UNESCO World Heritage Site is troubling in itself - but the cause of the damage is even more worrisome.
36-Hour Precipitation Outlook
Climate change 'deadlock'
Will the new Lima Call to Climate Action produce a working deal?
Houseplants that can help clear the air
It’s time to shift from outdoor gardening to keeping the green going inside.
Mars may have been more Earth-like for longer
NASA's Curiosity rover has found evidence that Mars was far more Earth-like in i...