الأحد، 5 فبراير 2012

ScienceDaily: Latest Science News

ScienceDaily: Latest Science News

Caribbean lizards settle 'founder effect' controversy

Posted: 02 Feb 2012 12:11 PM PST

In the first experimental study of the founder effect in a natural setting, researchers found that natural selection does not overwhelm the founder effect.

Identical twins reveal mechanisms behind aging

Posted: 02 Feb 2012 12:11 PM PST

Researchers compared the DNA of identical twins at different ages. They showed that structural modifications of the DNA, where large or small DNA segments change direction, are duplicated or completely lost, are more common in older people. The results may in part explain why the immune system is impaired with age.
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