Tracking cyberextortionists and their roving swarms of bots.

How memories go wrong.

The F.B.I. needs informants, but what happens when they go too far?

The search for the genetic distinction that allows certain animals, humans included, to be domesticated.

Most military experts agree that robots, not people, will inevitably do the fighting in ground wars. In Tennessee, a high-end gunsmith is already there. The story of Jerry Baber and his robot army.