The robot uprising has been delayed slightly, thanks to German engineers. The new Care-O-bot home robot faces several disadvantages if it decides to slaughter us all: First, it only has one highly flexible arm. Secondly, the arm automatically deactivates if a human comes into its radius, thanks to color cameras, 3-D sensors and laser scanners. It "read" human gestures, such as "put down that knife." (Unfortunately, it's also programmed to recognize household objects, such as electric carving knives.) The Care-O-bot is developed by the Fraunhofer Institute for Manufacturing Engineering and Automation IPA in Stuttgart. Click to enlarge. [Science Daily]