It's estimated that more than half of the indoor cats in the U.S. are overweight. Now researchers are looking for new ways to help felines slim down.
The American chestnut tree used to make up a quarter of the forests in the eastern U.S., but disease decimated these trees in the last century. Now there's an effort to restore the American chestnut.
As alternative medical treatments gain traction in the U.S. and the demand for Chinese herbs grows, farmers in Appalachia are responding.