Roy Wenzl

Working overtime may cost too much, a Kansas State University researcher says. Sarah Asebedo, a doctoral student, has found a link between “workaholism” and reduced physical and mental health, the university said in a statement

Charles Koch, who runs Koch Industries and contributes to political groups and campaigns, said he will launch a new campaign on Wednesday to laud economic freedom and warn the public about government overreach. He knows this means he will again draw fire from political critics.

Charles Koch's wife says there is much endearingly quaint about the man so many now vilify. Yet even Liz Koch's stories about him show a drive and a relentlessness that sometimes scare her. And she's suffered for some of his decisions that have demonized Charles and David Koch in American popular culture. The family now lives night and day with bodyguards.

The Koch brothers' political spending and the network of conservative political organizations they fund have sparked condemnation and criticism.

Scientists working in Texas have found human artifacts in a soil layer nearly 16,000 years old -- a discovery they say will rewrite a major chapter in the story of the first humans to cross from Asia to Alaska, whether on foot or by boat.