but the biggest challenges are still to come.

This October Carnegie Mellon University will celebrate the 25th anniversary of its renowned Robotics Institute and welcome a few new members into its Robot Hall of Fame. The fact that two of this year’s inductees—Astroboy and C3PO—are imaginary is typical in a field that lingers somewhere between science and fiction. One of the ultimate goals for roboticists, a machine that’s as easy to talk to as a human, is still