Links 31/05/13

Germany's national railway operator will soon be flying small drones over its tracks, bridges and stations to keep a watchful eye out for vandals spraying graffiti.

At North Shore University Hospital on Long Island, motion sensors, like those used for burglar alarms, go off every time someone enters an intensive care room. The sensor triggers a video camera, which transmits its images halfway around the world to India, where workers are checking to see if doctors and nurses are performing a critical procedure: washing their hands. 

"Killer robots" that could attack targets autonomously without a human pulling the trigger pose a threat to international stability and should be banned before they come into existence, the United Nations will be told by its human rights investigator this week.

Ed Stone has spent 36 years guiding the twin Voyager spacecraft through the Solar System. Next stop, interstellar space.

The next destination for the Opportunity Mars Rover.

Cape York in Opportunity's rear-view mirror.

Time lapse video of Curiosity Rover's first 281 Sols on Mars.