In upstate New York, a reproduction of an instrument in Lithuania, built in the 18th century, brings a precious craft back to life.

  Want to eat more ethically? It may be more complicated than just giving up meat.

  Some species tolerate high levels of tetrodotoxin, and answers may lie in the evolution of sodium ion channels.

  Discrete clusters for eating and making tools were previously thought to be associated only with modern Homo sapiens.

  Educators took flight, and starred on video, all in the name of science and math.

  The dissection of the brain of Henry Molaison, an amnesiac, has opened the door to a much more ambitious project.

  Many cystic fibrosis patients owe their lives, at least in part, to a nationwide collection of profiles called a patient registry.

  Russell T. Hurlburt, of the University of Nevada, Las Vegas, explores inner life, and faces skeptics.

  The White House is trying to address the vulnerability of banking, energy and communications systems to attacks.

  Senator Dianne Feinstein introduced legislation to protect a million acres of the Mojave Desert in California by scuttling planned solar plants and wind farms.

  A geologist whose drilling in search of clean energy caused earthquakes in Basel was acquitted Monday because he had not deliberately damaged property or acted carelessly.

  A Colorado woman who became ill after a vacation to Uganda becomes a bit of a medical wonder after surviving a case of Marburg hemorrhagic fever.

  Brazil and India are now among the top five government supporters of research into third-world diseases, according to a study.

  A small research trial found that adults who cut their viewing time in half burned 120 more calories a day.