Trundling along in essentially the same form for some 220 million years, turtles have seen dinosaurs come and go, mammals emerge, and humankind expand its dominion. Is it any wonder the persistent reptile bested the hare? In this engaging book physiologist Donald Jackson shares a lifetime of observation of this curious creature, allowing us a look under the shell of an animal at once so familiar and so strange.
Here we discover how the turtle’s proverbial slowness helps it survive a long, cold winter under ice. How the shell not only serves as a protective home but also influences such essential functions as buoyancy control, breathing, and surviving remarkably long periods without oxygen, and how many other physiological features help define this unique animal. Jackson offers insight into what exactly it’s like to live inside a shell—to carry the heavy carapace on land and in water, to breathe without an expandable ribcage, to have sex with all that body armor intervening.
Along the way we also learn something about the process of scientific discovery—how the answer to one question leads to new questions, how a chance observation can change the direction of study, and above all how new research always builds on the previous work of others. A clear and informative exposition of physiological concepts using the turtle as a model organism, the book is as interesting for what it tells us about scientific investigation as it is for its deep and detailed understanding of how the enduring turtle “works.”
The Remarkable History and Reconstruction of the First Operational Submarine
At the onset of the American Revolution, the British expected to quell the rebellion quickly with a show of overwhelming force. In an experiment in asymmetric warfare, David Bushnell created the first submarine vessel designed specifically “for the destruction of vessels of war.” On a quiet September night in 1776, sergeant Ezra Lee maneuvered Bushnell’s strange little craft out from Manhattan and into the midst of the greatest naval fleet ever assembled in the Americas. Lee’s goal was to sink the British flagship HMS Eagle by attaching a powerful explosive to its hull. Although the mission was unsuccessful, Bushnell’s concept of submarine warfare was considered by George Washington to have been “an effort of genius.”
David Bushnell was raised in the town of Saybrook at the mouth of the Connecticut River. More than two centuries later, another Turtle would be launched into the same river within sight of Bushnell’s first forays with his vessel during the summer of 1775. Under the direction of technical arts teacher Frederic J. Frese, students at Old Saybrook High School created a working replica of Bushnell’s submarine, facilitated through an education partnership with the Naval Undersea Warfare Center in Newport, Rhode Island, where Roy R. Manstan was a mechanical engineer and Navy trained diver. With twenty-first century submariners at the helm, the Turtle replica was subjected to a series of operational tests at the Mystic Seaport Museum in Mystic, Connecticut.
In Turtle: David Bushnell’s Revolutionary Vessel, the authors provide new insight into Bushnell’s “engine of devastation,” tracing the history of undersea warfare before Bushnell and the origin of the many innovations Bushnell understood would be necessary for conducting a covert submarine attack. The knowledge gained from testing the Turtle replica enabled the authors to speculate as to what America’s first submariner Ezra Lee experienced that September night and what may have caused the attack to fail.
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