Followers may tune out when municipalities tweet too much

Municipalities don't need to unleash a tweet storm to keep their citizens informed on the social network Twitter. In fact, according to Penn State researchers, municipalities that tweeted less-frequent, but more focused, ...

How Stone Age humans unlocked the glucose in plants

Early cave paintings of hunting scenes may give the impression our Stone Age ancestors lived mainly on chunks of meat, but plants—and the ability to unlock the glucose inside—were just as key to their survival.