Achilles' heel was his weak spot in the Greek myth, but the heel of a newly discovered primate provides a strong connection between humans and their possible ancestors.

Peter Bergen says Americans will have to decide if the yield of NSA-monitored calls justifies the invasion of privacy

Mark Quarterman says the slaughter of elephants for their tusks is at its worst in decades. As demand for ivory soars in Asia, Africa's vicious militant groups are killing elephants to pay for their arms and ammunition.

Wendy Weiser says the Supreme Court's ruling on Arizona voting restrictions was a win for voters, but why stop there? It's time to modernize the U.S. election system

Yury Fedotov says progress has been made but not fast enough to help millions of trafficking victims

George Gascon, a former police chief, says immigrants are less likely to report if they are victims of crimes if they fear police. It's in law enforcement's interest to bring them out of shadows

Although non-traditional therapies can be valuable, sometimes a line is crossed. So how can you tell if your alternative healer is a quack?

Ruben Navarrette says the story of the boy who was bashed on social media after singing the National Anthem in mariachi costume is instructive

Fifty years ago, President Kennedy defined civil rights and equality as a moral issue. Patrick Kennedy says today's moral issue is that people with brain injuries and mental illness face stigma and inadequate treatment.

Donna Brazile says anti-abortionist Rep. Trent Franks just doesn't get it when he justified why victims of rape and incest get no exception in his proposal for an abortion bill.