Giant pandas returning to DC’s National Zoo

Two new giant pandas are coming to D.C.’s National Zoo from China. The Smithsonian's National Zoo made the announcement Wednesday, a little more than six months after sending its three pandas back to China. 

What can we learn from fire ants? Maybe a lot

Experts say black fire ants arrived in the U.S. in 1918 and red fire ants in the 1930s, leading to a massive population increase, with five times more ants per acre than in South America, and they're infamous for their bites and stings.