Guano dramatically boosted the production of maize, and the surplus helped fuel the Chincha Kingdom’s economy.

New models suggest that Europa has very little tectonic activity at its seafloor, which is potentially catastrophic news for the hopes of finding alien life within its ocean.

Physics is the search for and application of rules that can help us understand and predict the world around us. Central to physics are ideas such as energy, mass, particles and waves. Physics attempts ...

The Center for Astrophysics and Space Astronomy (CASA) is dedicated to advancing our understanding of the Universe in which we live through observations, theory, and the development of ground-based ...

Editor's preface / A.V.G. Betts -- Preface / S.W. Helms -- Introduction / S.W. Helms -- Stratigraphy / S.W. Helms -- The Pottery / S.W. Helms -- Stamped, incised and ...