NASA had briefly considered delaying next Tuesday?s mission after an independent group of engineers raised concerns about microscopic cracks in three heat shield panels that protect the shuttle?s wings.

  The government and a private group are at odds on tuna?s safety.

  A carbon-neutral green-development zone in Libya may serve as a model for environmentally friendly design.

  Cindy Lee Van Dover is a pioneer: a submarine pilot and the first woman to direct the Duke University Marine Laboratory.

  The cane toad is growing so big and hopping so rapidly into new territory that they are developing severe arthritis.

  Women who go onto their hands and knees while in labor may be able to reduce the pain of childbirth, researchers say.

  As schools expand to include students with physiological and psychological challenges, the school nurse has become more than just someone to detect a fever from a fake.

  Is television at the dinner table better than no dinner table at all?

  Insurance, not race, seems to play a role in the risk of developing a burst appendix, a new study shows.

  Recalls of listeria-contaminated foods have dropped, but some are still at risk.

  A drought in the Southeastern United States has become so severe that some cities are just months away from running out of water.

  Scientists have concluded that Saturn?s frigid moon Enceladus is one of the few volcanically active bodies in the solar system.

  Why do some words evolve rapidly, while others hardly evolve at all?

  Nutritional supplements are generally not taken into account when health researchers try to get a snapshot of the nation?s nutritional habits, a new study finds.