Space exploration's next frontier: Remote-controlled robonauts

As Japan's second female astronaut to fly up in the Space Shuttle Discovery, Naoko Yamazaki didn't expect to spend a quarter of her time dusting, feeding mice and doing other menial jobs. It can cost more than $430 million a year to keep an astronaut in orbit, according to three-year-old startup called Gitai Inc. It's only possible to keep humans alive in outer space because of the money and effort poured into ensuring their safety. One way to bring down the cost and risks is to send an avatar -- a remotely controlled robot. "There's a need for robots that can help us," Yamazaki, 49, said.