After the third-warmest October on record, the U.S. is having it's second-hottest year-to-date.
Weather and climate can have unexpected complex impacts on the timing and appearance of fall foliage.
Winter will bring continued dry conditions in California, the Southeast and parts of the Northeast.
New research shows that drought is likely to stoke conflicts in the world's poorest countries.
A key threshold for the Paris climate pact has been surpassed, meaning it's nearly ready to take effect.
Reservoirs are responsible for 1.3 percent of global man-made greenhouse gas emissions, a study says.
Climate change poses a national security risk, but the Obama administration has a plan to deal with it.
As Zika spreads northward, scientists are beginning to understand how humans stoked the epidemic.