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Entelognathus primordialis,which lived some 420 million years ago, is the earliest known creature with a modern jaw. It could upend our understanding of how jawed vertebrates evolved.

What happens when you ask architects to re-imagine a structure mandated by the Jewish holy book? A freaking cool cultural piece of art, that's what.

Everything former Secretary of State Hillary Clinton says gets a tremendous amount of attention, even if she says virtually nothing, says strategist Geoff Garin. And that's not likely to change as the 2016 presidential race gets closer.

With a 44-second victory, Oracle Team USA faced down Emirates Team New Zealand at the finals Wednesday to hold onto the America's Cup. Wednesday's race capped off an America's Cup competition that included capsizing and shattered masts, and an Oracle Team USA that seemed sure to lose.

"We believe firmly that children should be kept in school and out of courts," says Justice Department official Robert Listenbee. In his new role leading the Office of Juvenile Justice and Delinquency Prevention, he's trying to help stop what experts describe as a "school-to-prison pipeline."

Jackson's newest release, The Bluegrass Album, is exactly what its title promises: a collection of bluegrass covers, as well as some originals written in the style.

Gov. Tom Corbett hopes to tap into federal money offered as part of the Affordable Care Act to extend Medicaid coverage to more people. But he has conditions. His alternative would require some people to pay an insurance premium and to look for work.

Florida's Indian River lagoon is a rich estuary, home to dolphins, manatees and turtles. But in recent months, it has become clear that something is wrong. Scientists and government officials blame water discharges from Lake Okeechobee and an upswing in pollution.

Homeless-services providers in Los Angeles County are gathering data on the homeless population and ranking people by vulnerability. The goal is to get the most in need into permanent housing quickly. The "housing first" approach has been used in cities nationwide, but it has its critics, even among other advocates.

Unless Congress and the White House come together on a bill to fund federal agencies, a large part of the government will be closed on Tuesday, Oct. 1. If a shutdown occurs, Social Security checks, food stamps and unemployment insurance would not be affected. But some vacation plans could be disrupted.