The concept of the circle is ubiquitous. It can be described mathematically, represented physically, and employed technologically. The circle is an elegant, abstract form that has been transformed by humans into tangible, practical forms to make our lives easier.
And yet no one has ever discovered a true mathematical circle. Rainbows are fuzzy; car tires are flat on the bottom, and even the most precise roller bearings have measurable irregularities. Ernest Zebrowski, Jr., discusses why investigations of the circle have contributed enormously to our current knowledge of the physical universe. Beginning with the ancient mathematicians and culminating in twentieth-century theories of space and time, the mathematics of the circle has pointed many investigators in fruitful directions in their quests to unravel nature’s secrets. Johannes Kepler, for example, triggered a scientific revolution in 1609 when he challenged the conception of the earth’s circular motion around the sun. Arab and European builders instigated the golden age of mosque and cathedral building when they questioned the Roman structural arches that were limited to geometrical semicircles.
Throughout his book, Zebrowski emphasizes the concepts underlying these mathematicians’ calculations, and how these concepts are linked to real-life examples. Substantiated by easy-to-follow mathematical reasoning and clear illustrations, this accessible book presents a novel and interesting discussion of the circle in technology, culture, history, and science.
On May 8, 1902, Mont Pelée on the island of Martinique exploded. A deadly cloud of steam and ash churned through plantations and villages, flattened the grand city of St. Pierre, then thundered into the bay where it sank eighteen ships and hundreds of smaller craft. Within a minute or two, nearly 30,000 humans died. The splintered rubble of their homes and belongings burned for three days, and the world began to understand the awesome power of nuées ardentes, glowing avalanches of hot gas and debris that sweep down the slopes of volcanoes, instantly steaming to death anything in its path. The enormous death toll was particularly tragic because it was avoidable. Had it not been for an unfortunate combination of scientific misjudgment and political hubris, most of the victims would have escaped.
In The Last Days of St. Pierre, Ernest Zebrowski Jr. counts down the days leading up to the catastrophe, and unfolds a tale intertwining human foolishness and heroism with the remarkable forces of nature. Illustrations contrast life in Martinique before and after the eruption, and eyewitness accounts bring the story to life.
Although it seems a long time since the destruction of St. Pierre, it is a mere blink of an eye in our planet’s geological history. Mont Pelée will erupt again, as will Vesuvius, Krakatau, St. Helens, Thera, and most other infamously fatal volcanoes, and human lives will again be threatened. The St. Pierre disaster has taught us much about the awesome power of volcanic forces and the devastation they can bring.
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