(Click on arrow at right to view full image) No true likeness of Callimachus is known to exist, but the Libyan-born poet probably resembled the men whose faces appear on the Hellenistic coffins unearthed in Fayum, Egypt, including this one.
Findings suggest a lack of faith in Harvard’s administration
The use of mobile phone data (left) proved more accurate for estimating the spatial spread of dengue fever than a traditional diffusion model (right). Graphic from Impact of human mobility on the emergence of dengue epidemics in Pakistan, published by PNAS
A School of Public Health study uses cell-phone records to predict the spread of dengue fever.
Among the contributors (clockwise from top left): Ellen Chubin Epstein, Adam Fratto, Renee Covi, Steven Erlanger, Lina S. Scroggins, Lynda Cohen Loigman, Viet D. Dinh, and Susan D. Wojcicki Photographs provided by the subjects
Fossil river deltas on Mars, such as this one in Eberswalde Crater, bear many similarities to river deltas on Earth. Such features suggest that Mars once had flowing liquid water on the surface, motivating study of the planet’s early climate.
Photograph by NASA/JPL/Malin Space Science Systems