New research underscores a vast transformation in the way scientists have come to understand the sleeping brain.

  Poor sleep among the elderly, it turns out, is not because of aging itself, but mostly because of illnesses or the medications used to treat them.

  The shuttle Discovery?s mission involves challenging construction work aboard the International Space Station.

  By all evidence, outrageously bad dreams are a universal human experience.

  Many people who take sleep medications think they work far better than laboratory measurements show they do.

  Bird sleep is so mysterious that scientists are considering several answers, all intriguing.

  Dr. Emmanuel Mignot has devoted his career to studying narcolepsy, a disease caused by a deficiency of the brain cells that make the neurochemical hypocretin.

  For ?closet co-sleepers,?revealing the truth isn?t worth the criticism.

  Even toddlers don?t get enough rest, but the real agony starts in the teens.

  Musings on sleep from scientists, philosophers, artists and more.

  A House committee said it would hold hearings into why the agency is withholding 24,000 responses to a government-sponsored safety survey.

  The homeland security secretary waived several environmental laws to continue building a border fence through a national conservation area in Arizona.

  The crew of the space shuttle mission scheduled to begin on Oct. 23 is close-knit team known for its camaraderie and inside jokes.