Under a Green Sky: Global Warming, the Mass Extinctions of the Past, and What They Can Tell Us about Our Future Hippocrene Concise Dictionaries infectious-disease expert Paul Offit takes

infectious-disease expert Paul Offit takes a look behind the curtain of the anti-vaccine movement

What if Time Travel were real

skin swappers

Using the guile and street wit that has helped her survive a lifetime of catastrophic obstacles

Drawing on recent scholarship and fresh archival discoveries

Under a Green Sky: Global Warming, the Mass Extinctions of the Past, and What They Can Tell Us about Our Future Hippocrene Concise Dictionaries infectious-disease expert Paul Offit takesMore than 200 million years ago, a cataclysmic event known as the Permian extinction destroyed more than 90% of all species and nearly 97% of all living things. Its origins have long been a puzzle for paleontologists, and during the 1990s and the early part of this century a great battle was fought between those who thought that death had come from above and those who thought something more complicated was at work. Paleontologist Peter D. Ward, fresh