Vol. 169 No. #15
Archive Issues Modal Example

More Stories from the April 15, 2006 issue

  1. Archaeology

    Early farmers took time to tame wheat

    Domesticated varieties of wheat emerged gradually in the prehistoric Near East over a roughly 3,000-year span.

  2. Animals

    Hummingbirds can clock flower refills

    Hummingbirds can keep track of when a particular flower has replenished its nectar and is worth visiting again.

  3. Planetary Science

    Making Mercury

    New computer simulations of Mercury's violent formation account for the planet's abundance of heavy elements and also reveal that some of the debris generated by the collision could have found its way to Earth and Venus.

  4. Planetary Science

    Another visitor to Mars

    The newest spacecraft from Earth arrived at the Red Planet on March 10.

  5. Health & Medicine

    Breakfast trends

    Although breakfasts tend to pack a lot of nutrition per typical calorie consumed, one in five U.S. residents skips this meal.

  6. Do flame retardants make people fat?

    Fat cells exposed to brominated flame retardants undergo changes that would appear to foster obesity and type 2 diabetes.

  7. Health & Medicine

    Alcohol spurs cancer growth

    Downing the human equivalent of two to four alcoholic drinks per day dramatically spurs the growth of cancers implanted in lab mice.

  8. Animals

    Foodfree growth

    Rattlesnakes undergo a hibernation-like state to survive long periods of famine, while continuing to grow longer.

  9. Anthropology

    Branchless Evolution: Fossils point to single hominid root

    Fossils of a 4.1-million-year-old human ancestor in Ethiopia bolster the controversial idea that early members of our evolutionary family arose one species at a time rather than branching out into numerous species.

  10. Health & Medicine

    Microbe Hunt: Novel bacterium infects immune-deficient people

    A newfound bacterium can cause illness in people who have a rare, inherited form of immune deficiency.

  11. Health & Medicine

    Estrogen Safety: Studies raise cancer, blood clot questions

    Two studies provide conflicting findings on estrogen therapy's effect on breast cancer risk, while a third study suggests that the hormone contributes to blood clot formation.

  12. Animals

    Into Hot Water: Lab test shows that worms seek heat

    Worms from deep-sea vents prefer water at temperatures near the upper limit of what animals are known to survive.

  13. Earth

    Limited Storage: Lack of nutrients will constrain carbon uptake

    Even though the carbon dioxide in Earth's atmosphere acts as a fertilizer for plants, the planet's vegetation won't be able to sequester large amounts of that greenhouse gas in the long term because it will quickly run out of other nutrients.

  14. Sleeper Finding: Hormone key to hibernation?

    A recently discovered hormone may play a major role in triggering and maintaining hibernation.

  15. Chemistry

    Dynamic Duo: Two catalysts build valuable carbon chains

    By combining the power of two well-known reactions, chemists have devised a way to alter the length of linear carbon chains.

  16. Planetary Science

    Brilliant! Tenth planet turns out to be a shiner

    Xena, unofficially called the 10th planet, is the second-most-shiny known object in the solar system.

  17. Plants

    They’re All Part Fungus

    Hidden deep in their tissues, all plants probably have fungi that don't make them sick but still may have a big influence.

  18. Earth

    Region at Risk

    Scientists are still analyzing the magnitude 7.9 quake that struck San Francisco a century ago and, at the same time, are scrambling to estimate when the next large quake will strike the Bay Area.

  19. Humans

    Letters from the April 15, 2006, issue of Science News

    Light shift Regarding “Blasts from the Past: Astronomers begin to go the distance with gamma-ray bursts” (SN: 2/11/06, p. 88), why is it that visible light is shifted to lower frequencies but gamma rays aren’t? Shouldn’t they have become X rays after all that distance? Stephen WoodOrlando, Fla. All wavelengths are redshifted. That means that […]