Book Review — Marchant, Decoding the Heavens

Marchant, Jo, Decoding the Heavens: A 2,000-Year-Old Computer–and the Century-Long Search to Discover Its Secrets, Da Capo Press, 2009, 328 pp.

Defining the Word “Anachronism”

In the latter half of the nineteenth century, the sponge divers of Greece lived through a technical revolution … the appearance of the diving helmet. After many centuries of free diving to harvest local sponges, the new equipment suddenly allowed access to much more of the Mediterranean sea floor and previously unexploited sponge beds. The industry boomed. Inadvertently, the diving helmet also led to the discovery of a shipwreck off the coast of the small island of Antikythera. Amidst the spectacular bronze and marble statues at the wreck site was a strange lunch box-sized lump, covered in a limestone coating from centuries of immersion and distorted by the effects of decomposition and corrosion. Here and there were visible bits of wood and corroded bronze, faint inscriptions of ancient Greek and what appeared to be thin loops or gears.

Compared to the glamorous artworks it was found with, the “lump” was rather unprepossessing and, indeed, it spent most of the 20th century in obscurity. Not knowing what it was, the curators made little effort to preserve the object, and increasingly, it broke into a more and more fragments in the storage rooms of the Athens’ National Archaeological Museum. The early 20th century descriptions made their way into the hands of a physicist and historian of science named Derek De Solla Price. In the 1950s, he made serious efforts to fully explain what it was, culminating in a 1974 book Gears From the Greeks. And it was partly through his efforts that people as diverse as Arthur C. Clarke, Jacques Cousteau, and Richard Feynman took an interest in the enigmatic archaeological find.

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Book Review – Ship of Ghosts

A few years ago I read “The Last Stand of the Tin Can Sailors” by James Hornfischer. That book is about the battle off of Samar, part of the larger battle of Leyte Gulf. Leyte Gulf was one of the largest naval battles in history.

The courage of those men on the “Tin Cans” blows me away. These little destroyers charged headlong into the teeth of much larger Japanese warships. Many paid the ultimate price. But I don’t want to give too much away. “Tin Can Sailors” is one of my favorite all time books.

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Swine Flu Shows How We Live In Good Times

BBC via Instapundit:

Readers in Mexico have been emailing the BBC describing the sense of fear gripping the country as a result of a flu virus outbreak, which has so far claimed more than 80 lives.

Well, that’s from Mexico so the number might be anything from 8 to 800 but still isn’t it a marvel that we live in age when we even deign to notice a mere 80 deaths in a place a couple of thousand miles away?  

Being able to fret about just one serious communicable disease is a luxury beyond price.  

Scientific and technological history is a passion of mine, so I’ve read a lot about medical history. Well up until WWII and the development of antibiotics and mass  vaccinations, our  forbearers  suffered through plague after plague of such scale that they make even AIDS look trivial by comparison.  

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Cool Retrotech

At this blog we have lots of smart Chicago Boyz and Chicago Grrlz and Readerz…but is anyone here as smart as a certain Chinese official from 1000 BC…or maybe even earlier?

Imagine that you are the official in charge of caravans and messengers. Some of these travelers need to cross an unmarked plain, which is subject to sandstorms, thick cloud layers, and heavy fogs…and they have frequently been getting lost. You need something that will aways point south. Problem: the magnetic compass has not yet been invented.

Can you think of a way–without using magnetic principles or other technology that wasn’t likely to be available in 1000 BC…to solve this problem? Think about it for a few minutes before reading further.

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