This volume contains the articles presented at the 21st International Meshing Roundtable (IMR) organized, in part, by Sandia National Laboratories and was held on October 7-10, 2012 in San Jose, CA, USA. The first IMR was held in 1992, and the conference series has been held annually since. Each year the IMR brings together researchers, developers, and application experts in a variety of disciplines, from all over the world, to present and discuss ideas on mesh generation and related topics. The technical papers in this volume present theoretical and novel ideas and algorithms with practical potential, as well as technical applications in science and engineering, geometric modeling, computer graphics, and visualization.

This volume contains the articles presented at the 21st International Meshing Roundtable (IMR) organized, in part, by Sandia National Laboratories and was held on October 7-10, 2012 in San Jose, CA, USA. The first IMR was held in 1992, and the conference series has been held annually since. Each year the IMR brings together researchers, developers, and application experts in a variety of disciplines, from all over the world, to present and discuss ideas on mesh generation and related topics. The technical papers in this volume present theoretical and novel ideas and algorithms with practical potential, as well as technical applications in science and engineering, geometric modeling, computer graphics, and visualization.

"A highly readable survey of the historical prelude to the study of the origins of life, as well as selected areas of current research, including the search for extraterrestrial life."-NatureWhere did we come from? Did life arise on earth or on some other planet? What did the earliest primitive organisms look like? Untangling a century of contentious debate, the authors explore current theories of the source of life-from Martian meteors to hydrothermal vents-and then present their own elegant scenario: Life arose not in the subterranean depths, as many believe, but on Earth's tumultuous surface, where a primitive form of natural selection spawned the first genetic material, perhaps in the form of a proto-virus. Knowing exactly how life began on Earth will not only teach us more about ourselves, it will bring us closer to finding life elsewhere.

Are we still evolving? Scientists have grappled with this question since the time of Darwin. Now, in this provocative book, biologist Christopher Wills argues that we are not only continuing to evolve but that our pace of change is accelerating. He examines the rapid, short-term evolutionary change taking place in people living at the earth's extremes (even as babies, Tibetans can draw in more oxygen than lowlanders), and the new physiology of those who participate in extreme sports. But the more we shape our environment, the more it seems to shape us: Whether the future has us wiring our brains into vast electronic databases, or popping "smart drugs" that alter the brain's very biochemical structure, new environmental pressures are speeding up our evolution in ways that we cannot now predict but that will help us to survive the future.

In this remarkable account, evolutionary biologist Christopher Wills takes us on a voyage of discovery through the exotic pasts of the viruses and bacteria that periodically emerge with such disastrous results for our species. It is our knowledge of their secret lives, the eons spent quietly passing in and out of myriad other life forms, mutating and coadapting, that gives us hope of taming them. By putting these organisms--from bubonic plague to Ebola--at center-stage, Wills shows how we will eventually master them.