"Mercury that we believe had once been in the stratosphere is now in the deepest trench on Earth." Here's why that important.

Exposure to toxic chemicals, especially flame retardants and pesticides resulted in more than a million cases of intellectual disability in the US between 2001 and 2016, research finds.

New research indicates climate warming and mercury contamination at the time of the Deccan Traps volcanism.

"These results should be reassuring to dog owners."