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The aborted execution of Clayton Lockett, who died of a heart attack, and problems in other states have sparked calls for a reassessment.

A World Bank forecast was based on purchasing power parity, an estimate of the cost of living in a particular country. But that isn't the only way to measure the size of an economy.

Asking preschoolers to be helpers is more effective than asking them to help, a study suggests. The noun-based approach works with adults, too, psychologists say, but don't take it too far.

The town of Trout River in Newfoundland has a bloated, methane-filled, 80-foot blue whale carcass on its beach, and people are concerned that it might spontaneously combust.

Over the next few days, Curiosity will drill deeper and collect samples, telling scientists about the fluids that once flowed across the area, a point of convergence for different types of terrain.

Authorities evacuated the general area but there are reports that some of the oil has seeped into the James River.

A bill to increase the federal minimum wage was blocked in the Senate on Wednesday, as Democrats failed to muster the 60 votes necessary to bypass a filibuster.

The economy slowed sharply in the first quarter, but Federal Reserve policymakers voted unanimously to continue winding down their stimulus program.

Oklahoma death row inmate Clayton Lockett's execution was botched on Tuesday, when a relatively new combination of drugs failed to work as expected.

Congress held its first hearing on "dark money," the donations to tax-exempt political groups that can keep donors' names secret. The star witness at the Senate committee was former Supreme Court Justice John Paul Stevens, a vocal critic of the rulings that opened the door for the secret spending.