Online extremist groups emerge like curdling milk, a dynamic that may also describe how the recently disclosed fake Facebook accounts attract followers.
Canadian company shows that hydrocarbon fuel made from captured CO2 could compete with fossil fuels.
The major war between law enforcement and cell phone manufacturers is mostly over.
As law enforcement increasingly uses body-worn cameras, researchers are studying the roles of camera design and perspective.
Scientists and engineers are exploring many strategies to cut the energy that powers modern computing.
Scientists can now link "acts of God" to climate change. That could give victims the power to hold someone accountable, say lawyers.