The Ecology of Cities
April 4, 1998 | Volume 153 | Number 14Cover: Traditionally, ecologists have sought out research sites in pristine environments. Now, the National Science Foundation is funding ecological projects in Phoenix and Baltimore, shown here. (Credit: J. Morgan Grove/USDA Forest Service)
News of the Week:
Why Are Boys Birth Rates Falling?
A recent pattern of waning male births and increasing reproductive defects suggests that environmental pollutants may be selectively affecting male fetal development.
Bony growths found in heart valves
Examination of defective heart valves removed from patients during surgery shows a significant number had bone growing inside the valve.
Colorful gene marks mosquito manipulation
Scientists have finally been able to genetically engineer mosquitoes so that the insects pass on selected traits to their offspring.
Ritalin may work better as purer compound
Half of every dose of the drug Ritalin may contribute nothing to its therapeutic effect while possibly adding to its side effects.
Gravitys ring: Hubble bags another lens
An image of a newly discovered Einstein ring shows for the first time both the ring and the intervening body in a single photograph.
Wild inbred butterflies risk extinction
Butterflies in the scattered meadows of Finnish islands may provide the first evidence of inbreeding contributing to extinction in the natural world.
Doubts aired over Neandertal bone flute
An ancient bone initially reported to have been fashioned into a flute by Neandertals more likely was chewed up by carnivores interested in food, not music.
Storms paint bulls-eyes in stratosphere
A satellite sensor captured images of ring-shaped waves arising from thunderstorms.
Did an ocean flatten Mars northern half?
Parts of Mars northern hemisphere may have been sculpted by an ancient ocean.
Finding rocks in the Hubble archives
Sifting through thousands of images taken by the Hubble Space Telescope, astronomers have discovered nearly 100 small, main-belt asteroids.
Rare, long view on frog ups and downs
Researchers publish what may be the longest series yet of frog census data, allowing them to distinguish between temporary dips and long-term declines in population.
Twisted sisters can straighten out
The asymmetry of hermit crabs, thought to be genetically determined, is actually a result of living inside spiral-shaped shells.
DNA scissors cleave their comrades
DNA can act as an enzyme, clipping itself and other DNA molecules in two.
Grainy wire self-assembles along DNA
DNA can serve as a template for the formation of silver wires only one-thousandth the thickness of a human hair.
Food & Nutrition
Chia for your petif it clucks
Hens who eat chia seeds lay eggs with fats friendlier to the heart.
Another way alcohol may help the heart
A Swiss research team identified a mechanism that appears to help explain why drinking a little alcohol regularly may benefit the heart.
Eye-scanning technology and other approaches involving face recognition, hand geometry, voice printing and signature verification for security purposes are entering the marketplace.
Ecologists Go to Town
A new science may emerge as ecologists and social scientists collaborate to investigate urban environments.
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