A piece of a satellite slammed into a Moon crater Friday morning in the hopes of kicking up debris for analysis.

  Surveillance cameras are everywhere these days, capturing just about everything: the good, the bad, the unmentionable.

  Two researchers have tried to resolve fluctuations in census figures using unusual data: numbers of recovered coin hoards.

  Although big cities often get attention for high-profile environmental efforts, towns and villages are looking for ways to conserve energy and use land wisely.

  Tim DeChristopher decided to make bids on oil and gas leases with no interest in drilling. Now he may pay for it.

  Closer examination of an Archaeopteryx fossil suggests that the species was a feathered dinosaur that did not have the characteristics of a modern bird.

  Faulting the Bush administration, the Interior Department barred oil and gas development at eight of the sites and said 52 others would be subjected to further study.

  Global warming will not necessarily change the amount of fish caught half a century from now, but it will shift catches away from the tropics toward the poles.

  What stopped Michelangelo from even starting the battle mural he was commissioned to do on the same wall as Leonardo Da Vinci’s “Battle of Anghiariâ€�?

  Nikon announced the winners of its annual photomicrography competition on Thursday.

  The Spitzer Space Telescope has discovered the biggest but never-before-seen ring around the planet Saturn.

  Dr. Gelfand’s pioneering work in many areas has proved crucial in quantum mechanics, M.R.I. imaging and CAT scans.

  The solving of a grand math challenge in the fields of theoretical computer science and complexity theory has garnered interest, but no real answers.

  The Pentagon’s research arm is working to mend relationships damaged under the Bush administration.