Of course, this all looks and sounds really scary, but if a 1000 robot-obsessed Japanese scientists haven't been able to build any normal-looking androids this big that don't fall over and don't require a gigantic power backpack of batteries, it's tough to believe that three crafty Bulgarians will do it.

ENGADGET: Prepare to be terminated: The Kibertron

These turned out to be thin-film photovoltaic cells, of the sort that could be sewn into a backpack and used to power a laptop.

NEWYORKER: Greening the Ghetto

Resembling a small child wearing an astronaut outfit with a backpack (for the battery power source), the ASIMO could walk on two feet at speeds at over three miles per hour.

FORBES: Reflections on Personal Robots, Backwards and Forwards