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AND logic gate design and function – The protein AND logic gate was built from a protein that bound maltose (the detector) and an enzyme that catalyzed a reaction (the reporter), which causes a color change in the solution or causes the bacteria to behave in a certain fashion.

Twin suicide bombings Thursday in a crowded marketplace in the north-central Nigerian city of Jos left at least 31 people dead.

Ukraine's president says a "fragile" cease-fire is actually in place for the first time in his country's seven-month conflict between government troops and Russian-back separatists.

A displaced woman from northern Mali in the Sahel, waits at a temporary shelter near Mopti's main bus station.

Ukrainian President Petro Poroshenko is pleading with Russia to remove its troops from war-torn eastern Ukraine.

Hong Kong authorities have begun clearing the territory's main protest site, bringing a likely end to more than two months of pro-democracy demonstrations there.

Democratic and Republican leaders in the U.S. Congress have reached a deal on a $1.1 trillion spending bill that would fund the federal government through next year.

A former top Chinese economic planning official has been convicted of bribery and sentenced to life in prison, becoming the latest high-profile figure to be brought down by China's anti-corruption campaign.

Human rights activists are calling for the prosecution of officials involved in the U.S. Central Intelligence Agency's use of extreme interrogation methods on suspected terrorists.