NPR News

Physicists have a grand theory that describes how tiny particles interact to form all the stuff we see in the universe — everything from planets to toasters to human beings.

But there is one particle predicted by this theory that has never been detected in experiments. It's called the Higgs boson. Scientists are dying to know if it really exists — and now researchers are closer to finding out than ever before.

If you're considering suicide, Facebook now stands ready to get you some help.

The gigantic social-networking site said Tuesday that if any of its 800 million users type a post saying they are contemplating suicide, the site will offer to connect them to a crisis counselor through the site's chat system.

According to many polls, former House Speaker Newt Gingrich is now leading the Republican pack. His plan to rewrite the nation's tax policy hasn't gotten as much attention as some of his other proposals, but, according to a new analysis, it would require sweeping changes to the government.

Signs suggest "that the economy has been expanding moderately" in recent months, "notwithstanding some apparent slowing in global growth," Federal Reserve Policymakers just reported.

And, as expected, they announced no policy changes that would either add or subtract to the amount of help the central bank gives the economy.

In "Fed speak":

Saying it can save taxpayers $50 million a year, the Treasury Department announced today that it is suspending almost all production of presidential dollar coins.