'Big Dog' could become a Marine's best friend.

• Author: Wagner, Breanne
• Position: Marine Corps - Brief article

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BALTIMORE -- Dogs are said to be man's best friend. Marine Corps officials hope that a new four-legged robot called "Big Dog" will be a Marine's best friend.

The designers of the robot, which was funded by the Defense Advanced Research Projects Agency, believe that someday it could serve as a Marine's pack mule. It would tote 200 pounds of gear that would otherwise be carried by Marines, said Maj. David Sadlier, who oversees the project at DARPA.

"The Marine Corps had an interest in it because it lightened the load," he said in an interview.

Big Dog, which is the size of a large dog or small mule, can walk, run or climb on rough terrain while carrying large loads of equipment, according to manufacturer Boston Dynamics, a robotics and human simulations developer. It has an on-board computer that controls its legs, keeps it balanced to steer and navigate and manages a suite of sensors.

Marine Corps officials also like the robot because it can closely follow a unit and traverse terrain that is inaccessible to unmanned ground vehicles.

"I don't think it is going to be that far in the future before we're...