Should robots be built to look more like us?

Whether or not the relationships are emotional, robots are certainly becoming more social. Especially in Japan, where robots are doing everything from collecting garbage to bathing the elderly to providing child care. Lewis, a picture-taking robot, also has a social role -- to linger on the edges of gatherings and catch people in candid poses.

As these social robots lurch their way into our lives, a question arises: What should they look like? Some scientists say they should look and talk like people, and take advantage of people's tendencies to personify. (Think C3PO.) Others say they should remain fundamentally nonhuman -- intelligent and capable of reading people, but not obviously anthropomorphic. (Think R2D2.)

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