Magazine
March-April 2003
March-April 2003
Volume: 91 Number: 2
The Roman emperor Trajan used the spoils from his conquest of Dacia (modern Romania) to pay for a new complex in the heart of Rome. Sometimes called the world's first covered shopping mall, the building now known as Trajan's Markets more likely served as an imperial headquarters for the control and distribution of goods in an empire that extended from northern Britain to the Euphrates River. In "Dating Ancient Mortar," John Hale, Jan Heinemeier, Lynne Lancaster, Alf Lindroos and Åsa Ringbom explain how they used samples from this site to test a new method for radiocarbon dating ancient buildings that contain lime mortar. (Photograph by Angelo Hornak/Corbis.)
In This Issue
- Agriculture
- Astronomy
- Biology
- Communications
- Computer
- Economics
- Engineering
- Environment
- Evolution
- Mathematics
- Medicine
- Physics
- Policy
- Psychology
- Sociology
- Technology
Genealogy in the Era of Genomics
Susanna Manrubia, Bernard Derrida
Evolution
Models of cultural and family traits reveal human homogeneity and stand conventional beliefs about ancestry on their head
Ecologically Sustainable Yield
Richard Zabel, Chris Harvey, Thomas Good, Phillip Levin
Agriculture Economics Policy
Marine conservation requires a new ecosystem-based concept for fisheries management that looks beyond sustainable yield for individual fish species
Influenza
Robert G. Webster, Elizabeth Walker
Environment Medicine
The world is teetering on the edge of a pandemic that could kill a large fraction of the human population
Dating Ancient Mortar
John Hale, Jan Heinemeier, Lynne Lancaster, Alf Lindroos
Physics
Although radiocarbon dating is usually applied to organic remains, recent work shows that it can also reveal the age of some inorganic building materials
