Frontispiece from Denis Diderot's Encyclopédie, 1772 edition. The engraving depicts the unveiling of Truth as the sun, representing the light of knowledge, drives away clouds. The other figures represent fields of inquiry such as history, botany, philosophy, and optics. Explication from ARTFL Digital Encylopédie Project at the University of Chicago; image provided by the Special Collections Research Center, University of Chicago.
The Irving K. Barber Learning Centre (formerly known as the Main Library) on the campus of the University of British Columbia. Photo from astroguy http://www.flickr.com/photos/astroguy/2459394405/
A photo of Charles Darwin's famous study at Down House, on the 200th anniversary of his birth and 150th anniversary of Origin of Species. He lived at Down House for the last forty years of his life, during which time he corresponded with over 2,000 scientists and interested members of the public. These exchanges contributed to the richness of his studies on evolution. Photo by PhOtOnQuAnTiQuE (CC license). See original for publicly contributed annotations on details in photo.