Vol. 168 No. #22
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More Stories from the November 26, 2005 issue

  1. Astronomy

    Images of a fiery youth

    A faint, infrared glow captured by the Spitzer Space Telescope might be light from the universe's first stars.

  2. Health & Medicine

    Sleep apnea could signal greater danger

    The nighttime breathing disorder called obstructive sleep apnea might double a person's risk of death or stroke.

  3. Planetary Science

    Found and lost

    Astronomers who previously announced that they had identified the likely remains of the Mars Polar Lander in images taken by an orbiting spacecraft now say that they were fooled by electronic noise in those images.

  4. Earth

    Antibiotics afield

    Antibiotics shed by livestock in manure can end up in crops or bound to soil, where they can foster disease-resistant germs.

  5. Health & Medicine

    Marrow cells boost ailing hearts

    Extracting cells from a heart attack patient's bone marrow and then inserting them into the person's heart via a catheter can improve pumping capacity.

  6. Health & Medicine

    New drug fights heart failure

    The experimental drug levosimendin, in combination with standard drugs, eases heart failure symptoms better than standard drugs alone do.

  7. Health & Medicine

    Endurance cycling tied to lasting heart damage

    Former professional bicyclers have signs of heart problems nearly 4 decades after competing in grueling endurance events.

  8. Health & Medicine

    Pill eases craving

    An experimental drug called varenicline helps cigarette smokers kick the habit better than bupropion does, the most effective medicine currently on the market.

  9. Health & Medicine

    Natural Ingredients: Method grows vessels from one’s own cells

    Starting with bits of skin, scientists have produced new blood vessels in a laboratory and successfully implanted them into two patients.

  10. Materials Science

    Atom Hauler: Molecular rig snags multi-atom loads

    Specialists in atomic-scale construction can now use a new molecule to gather small groups of atoms and drop them, as clusters, at specific locations.

  11. Earth

    Roots of Climate: Plants’ water transport cools Amazon basin

    Field tests in the Amazon have for the first time measured daily and seasonal movements of soil moisture through the deep roots of trees.

  12. Animals

    Unway Sign: Ant pheromone stops traffic

    Researchers have found a new kind of traffic sign on ant trails, a chemical "Do not enter" that keeps foragers from wasting their time on paths that don't lead to food.

  13. Earth

    Nonstick Taints: Fluorochemicals are in us all

    A new federal study strongly suggests that all U.S. residents harbor measurable traces of fluorochemicals, compounds found in a host of consumer products.

  14. Danger Mouse: Deleting a gene transforms timid rodents into daredevils

    By removing one gene from a mouse's standard repertoire, scientists have turned a timid animal into an intrepid one.

  15. DNA Clues to Our Kind: Regulatory gene linked to human evolution

    A gene that exerts wide-ranging effects on the brain works harder in people than it does in chimpanzees and other nonhuman primates.

  16. Astronomy

    Ring around the galaxy

    The Hubble Space Telescope has captured the largest number ever of elliptical galaxies with Einstein rings, a marker of gravitational lensing.

  17. Health & Medicine

    Staring into the Dark

    Amid a growing array of medications for treating insomnia, sleep researchers point to large gaps in their knowledge about which of these medicines work best and for how long they remain effective.

  18. Planetary Science

    Mars or Bust!

    Scientists are working to overcome the biomedical challenges that would hinder a human voyage to Mars.