A longstanding suspicion that guano (bird droppings) from offshore islands drove the success of coastal communities in what is now Peru, probably sustaining the Inca Empire, has received scientific ...

Abstract: Since the publication of the original paper on power system stability definitions in 2004, the dynamic behavior of power systems has gradually changed due to the increasing penetration of ...

Document management is an important yet time-consuming process — especially if you’re not using an electronic system to help you. A computerized filing system can assist with creating, storing, ...

Nestled on a mountain ridge in the Urubamba Valley, Machu Picchu was built as a palace that was part of a larger royal estate belonging to the Inca emperor Pachacuti (reigned ca. 1420–1472). A team of ...

The Millennium Simulation Project is a series of computer simulations run since 2005 to understand how galaxies and galaxy clusters form and come together to create large-scale filamentary structures.