Science News Magazine:Vol. 174 No. #6
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More Stories from the September 13, 2008 issue
Firm evidence that Earth’s core is solid
Faint yet distinct ground motions recorded by a large network of seismic instruments in Japan in early 2006 are the strongest, most direct evidence that Earth’s inner core is solid.By Sid Perkins
Health & Medicine
Heart to heart
Successful heart transplant experiment in infants draws attention to debate on defining death of organ donors.
Slave ants rebel
Species vulnerable to enslavement may evolve ways to fight their captors.By Susan Milius
Stars ablaze in other skies
A new study suggests that a surprising number of universes, even those with laws of physics different from those in our universe, can still support stars.By Ron Cowen
Tiny object points to remote solar system reservoir
Possible comet may be distant visitor from the innermost region of the Oort Cloud, the proposed comet reservoir of the outermost solar system.By Ron Cowen
Some magpies recognize themselves in mirrors, indicating that a basic form of self-recognition evolved in one family of birds.By Bruce Bower
Carcinogens from car exhaust can linger
Free radicals similar to those in cigarette smoke may form when car exhaust cools off, and may persist indefinitely in the air.
FBI reveals more details of anthrax investigation
A panel of scientists involved in the anthrax investigations released new details.
Health & Medicine
Dopamine fends off zzzzz’s
A reward chemical in the brain helps keep sleep-deprived people awake.
Popular plastics chemical poses further threat
The chemical bisphenol A may raise the risk of heart attacks and type 2 diabetes by suppressing a protective hormone.
Herds of grazing and resting deer and cattle tend to align themselves with the Earth’s magnetic field, a hint that the large mammals can somehow sense the invisible field.By Sid Perkins
Potent Promise: Essential Stemness
Normal 0 false false false MicrosoftInternetExplorer4 Stem cells’ powers of self-renewal, immortality and potential for medicine inspire those who study them. But progress toward understanding them has been slow — it took 20 years just to figure out how to grow embryonic stem cells in the laboratory. More recently, though, molecular techniques have enabled swift movement on […]
Potent Promise: Back to the Womb
Normal 0 false false false MicrosoftInternetExplorer4 Normal 0 false false false MicrosoftInternetExplorer4 RESET BUTTON Scientists are now able to “reset” the DNA in a mature body cell so that the cell can grow into any kind of cell in the body, from heart muscle cells to nerve cells and bladder cells. Bryan Christie DNA METHYLATION […]
It’s Likely That Times Are Changing
A century ago, mathematician Hermann Minkowski famously merged space with time, establishing a new foundation for physics; today physicists are rethinking how the two should fit together