Medscape

Barrett Esophagus Onset Occurs Decades Before Diagnosis

Molecular clock modeling suggests that the biological onset of Barrett esophagus occurs more than 20 years before the ...
Technology Networks

Centenarians Reveal Clues to Healthy Brain Aging

Researchers studied cognitively healthy centenarians to understand resilience to aging and dementia. Epigenetic clocks ...

HIV disrupts lung 'clock,' raising COPD and emphysema risk

People living with HIV face a greater risk of developing lung diseases at a much younger age, even if they have never smoked.
The Scientist

The Molecular Clock

For this article, Steve Bunk interviewed S. Blair Hedges, evolutionary biologist, Pennsylvania State University. Data from the Web of Science (ISI, Philadelphia) show that Hot Papers are cited 50 to ...