On the Cover
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 many ways, the fight against antibiotic resistance is already lost; preventing bacterial disease requires thoughtful new approaches
Models of cultural and family traits reveal human homogeneity and stand conventional beliefs about ancestry on their head
Marine conservation requires a new ecosystem-based concept for fisheries management that looks beyond sustainable yield for individual fish species
The world is teetering on the edge of a pandemic that could kill a large fraction of the human population
Although radiocarbon dating is usually applied to organic remains, recent work shows that it can also reveal the age of some inorganic building materials
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