Robots

NASA is no stranger to building robots, having created ones that are currently exploring Mars, traveling to the International Space Station and ones that look like inflatable "aliens."

In the not so distant future, humans will merge with machines.

China calls them scavengers, Russia calls them inspectors and the US calls them threats.

Each group must design a robot that can not only survive underwater but also retrieve objects.

With funding from NASA , researchers are working to build robots that can explore moon pits, sinkhole-like structures that could be full of resources and could even make good astronaut homes.

Starsky Robotics have been testing driverless semi-trucks for three years in two states; Phil Keating reports from Miami.

Videos of Boston Dynamics' robots have been the stuff of both awe and inspiration, as well as nightmares. Now, it appears the robots will be doing more than just performing parkour or dancing around on videos. They're going up for sale.

The Navy is planning to launch a massive, 50-ton undersea drone to expand mission scope, increase attack options, integrate large high-tech sensors, further safeguard manned combat crews and possibly fire torpedoes -- all while waging war under the ocean surface.

Iron Ox creates a farm where physically demanding jobs like seeding, planting, transplanting and harvesting are performed by robots in an industrial warehouse. Claudia Cowan reports from San Carlos, California.

Knock, knock, no one's there.