Computer animation powers A Bug’s Life to the box office. What is wire-frame animation? What other techniques are used to bring pixels to life in the movies?

New push for renewable energy: Solar hydrogen, wind farms and fuel cells all have potential — and problems.

Biological weapons are microscopic killing machines containing viruses, fungi or bacteria — or the toxins made by these organisms. Read the history — and future — of living WMDs.

Okay, maybe it’s not an invasion, but there are robots on Mars, in cars, and down in the deep blue sea. How do robots know what to do?

The Sacramento Municipal Utility District announced that it would buy enough solar panels to make 10 million watts of electricity. That’s enough to power about 3,000 customers during the day, when the sun is shining, and when the utility faces its peak demand.

IBM computer beats world champ Garry Kasparov. How do chess computers work? Do they think differently than humans, or just faster?