Have you ever splurged on a highly rated bottle of Burgundy or pinot noir, only to wonder whether a $10 or $15 bottle of red would have been just as good? The answer may depend on your biology.

A new study by researchers at Penn State finds that when it comes to appreciating the subtleties of wine, experts can taste things many of us can't. "What we found is that the fundamental taste ability of an expert is different," says John Hayes of Penn State.

It would be difficult for some people to let a stranger drive off with one of their most valuable possessions. But not for Stanford graduate student Katie Hagey.

Hagey is one of a growing number of individual car owners who have started renting their wheels to people they don't know through car-sharing startup companies resembling the better-known Zipcar.

In several hours of talks, President Obama and Israeli Prime Minister Benjamin Netanyahu seemed to have different timelines and red lines on the issue of Iran's nuclear program: Obama said he prefers diplomacy and pressure; the Israeli leader made clear his country reserves the right to attack pre-emptively, saying Israel must remain master of its fate.

It's Super Tuesday for the Republican presidential contenders, and 10 states are holding primaries and caucuses.

Former Massachusetts Gov. Mitt Romney hopes he can firm up his front-runner status — a status that, an NPR analysis shows, has so far involved his campaign and a pro-Romney superPAC burying the opposition with negative messages.

In a final day of campaigning before Super Tuesday, Republicans Mitt Romney and Rick Santorum focused on the economy in Ohio, the most sought after prize in the 10 states voting or caucusing.

A week ago, Santorum had a substantial lead in Ohio polls; now he's in a statistical dead heat with Romney.

The U.S. Supreme Court said Monday that it will hear reargument next term in a major human rights case, raising the specter that the justices might reverse a 2004 ruling that allowed some lawsuits in U.S. courts for human rights atrocities committed abroad.