Chichén Itzá, "the mouth of the well of the Itzás," was likely the most important city in the Yucatán from the 10th to the 12th centuries. Evidence indicates that the site was first settled as early ...

A set of new imaging tools now allows researchers to see how specific fat molecules, called phospholipids, are distributed across cell membranes in three dimensions and at nanometer-scale precision.

Luma Institute is a global education company that teaches people how to be more innovative by applying the discipline of human-centered design. Harvard Business ...

Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit NAP.edu/10766 to get more information about this ...

X-ray diffraction methods lie at the foundation of materials science. Determination of the crystal structures of natural minerals and, later, of crystals grown in the laboratory led to our ...

Desperate North Korean fishermen are washing ashore as skeletons because of the world's largest illegal fleet. Chinese fishing vessels moored off of Ulleung Island, South Korea. (Fábio Nascimento) ...

DNA microarrays provide a means to quantify tens of thousands of discrete sequences in a single assay. Among the most widespread uses of microarrays is expression profiling 1,2, which has found many ...

Robert Kelly is managing director of XTS Energy LLC, and has more than three decades of experience as a business executive. He is a professor of economics and has raised more than $4.5 billion in ...