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Evoking adventure made possible by the railroad, steamship, and automobile, and before adventure was accelerated beyond recognition by the jet airliner, these 50 National Geographic articles hail from the 1890s to the 1950s. Simon Winchester's introduction rues the haste travel has acquired, while the commentary of editor Jenkins ( Off the Map: Bicycling across Siberia, 1992) introduces the author and the genesis of his or her odyssey. Theodore Roosevelt's postpresidency safari kicks off the geographical organization--Africa, South America, and so forth--and also typifies Jenkins' editorial preferences for the lost worlds of imperialism, still-unexplored regions of earth and sea, and peoples untouched by modernity. Some of Jenkins' selections may be oft-anthologized classics by Roy Chapman Andrews, Richard Byrd, and Edmund Hillary, but most are not frequently reprinted. Collectively, Jenkins' grouping captures imagination-firing details in non-Western settings, such as capture by Mongolian bandits. Suiting the armchair as well as they did as long as a century ago, these articles will be popular indeed. Gilbert Taylor Copyright © American Library Association. All rights reserved --This text refers to the Hardcover edition.

Sometimes referred to a place where one can find one's textbook for free. I wouldn't count on that; surveying the Mathematics section, I found it limited. Still, considering what one pays for Math and Science books, a page of free downloads may be worth one's while.

Time isn't what it used to be  TIME is not what it used to be. Once a flowing river whose current we passively monitored, time is now more properly understood as something constructed by the brain and personalised by culture. We have relationships with time; we fight it and manipulate it. Into this arena steps Eva Hoffman with her poetically scientific and austerely titled Time. Hoffman is on an exploration to become intimate with time, motivated by her sense that our interaction with time has changed. Our societies have become obsessed with time and timekeeping, both in the workplace and at home. Jet travel manipulates our experience of day-night cycles and seasons, while biomedical science races to increase our lifespan yet further. At the other end of the spectrum, new technologies adapt our minds to the ever-briefer scales of micro and nano. Hoffman covers a lot of ground, from physics (why time flows in only one direction) to biology (the circadian rhythm and sleep) to neuroscience (how temporality is constructed by the brain). She addresses questions of time and consciousness, including the uniquely human ability to envision large vistas of past or future. Perceived time is illuminated by disease states such as Alzheimer's disease or Korsakoff's syndrome, in which one's time narrative becomes disorganised, and by fantasies and dreams, in which the unconscious brain does not necessarily commit to a temporal narrative at all. Hoffman also investigates individual differences in how people treat time (those who leave parties early versus those who have to be shooed out at the end) as well as cultural differences (communities in which haste amounts to a breach of ethics, for instance). A recurring theme is that the human capacity to manipulate our environment ushers in new complexities to the basic biology of time. For example, while other animals age and die on a strict schedule, humans do everything in their power to control that timing. And the book is full of

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