Night lights used to track diseases

Satellite images of city lights can be used to monitor outbreaks of disease, says a team led by Princeton University.

Man hacks Siri for home automation tool

An Australian man has hacked Apple's Siri voice assistant to turn it into a home automation controller.

Americans 'clueless' on energy saving

A new study brands Americans 'clueless' on energy-saving measures, saying they expect tiny changes to save the planet.