Epigenetics Offers New Clues to Mental Illness, Photographed by Plamen Petkov for Scientific American

Photo Editor Monica Bradley

To read the full story please follow the link:

http://www.scientificamerican.com/article.cfm?id=hidden-switches-in-the-mind

OPTIMISM, Plamen Petkov for Psychology Today

To see the full article please visit

http://www.psychologytoday.com/articles/201110/optimism

Stylist Lisa Edsålv