An edge-on view of Uranus' rings, possible only once every 42 years, shows that the dust distribution has changed significantly since Voyager 2 took photos in 1986. Keck and Hubble observations show the inner rings more clearly as the bright outer rings dim, and may discover new moons that shepherd the ring debris.

No matter what the disaster -- hurricane, earthquake, terrorist attack -- the nation's first responders get to the scene soon after. Which is why it's such a crime when these people can't communicate with each other.

Web War I: How rogue botnets launch and sustain a distributed denial of service attack, in words and pictures.