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During the two years of their interment the lathe remade the tools -- like taps and dies -- which were first used to create it. A lather has those self-reproductive qualities.

Over years of tinkering, Gingery was able to bootstrap a full-bore machine shop from alley scraps. He made rough tools that made better tools, which then made tools good enough to make real stuff.

In its center was a coffee can of smoldering BBQ charcoal. Inside the can of charcoal was a small ceramic crucible into which he threw scrap aluminum – cans, etc. Gingery forced air into this crude furnace via a fan, burning the charcoal with enough heat to melt the aluminum. He poured the molten metal into a mold of wet sand carved out in the shape he wanted. When the cast was cool he had a workable metal holding plate, which became the heart of a homemade lathe. Other lathe parts were cast. He finished these rough parts with hand tools. His one “cheat” was adding a used electric motor – although it is not impossible to imagine a wind or water powered version.

When the rough lathe was up and running he used it to turn out the parts for a drill press. With the drill press and lathe operating he constantly reworked pieces of the lathe itself, replacing parts with improved versions. In this way, his tiny machine shop was an upcreation device, capable of generating higher a machine of precision than itself.

Gingery recapitulated the evolution of technology, the great pattern by which simple tools create more complex tools and so on infinitum. This expansion of upcreation power is the means by which an entire culture lifts itself out of mud by pulling up on its bootstraps.

Yet is it obvious this little demonstration is not pure. As a way to make your own machine tools, Gingerys’ plans are fine and dandy. He uses cast off washing machine motors and other junkyard scrap parts to grow a fairly robust machine shop. But as an example of relaunching a technological society in a kind of Robinson Crusoe maneuver – landing somewhere and starting civilization up -- it’s a cheat because in this latter game you don’t get to start with discarded aluminum cans, scavenged nuts and bolts, old electric motors and waste sheet metal.

Select at random any one of the many thousands items within the reach of where you now sit. None of them could exist without many of the others around it. No technology is an island.

This is why restarting a sophisticated society after a devastating setback is so hard. Without all the adjacent items in a given ecological bundle, a single technology can have no effect

The conundrum of disaster relief is a testimony to this deep interdependency: one needs roads to bring petrol but petrol to clear roads, medicines to heal people, but healthy people to dispense medicines, communications to enable organization but organization to restore communications. We see the interdependent platform of technology primarily when it breaks down.

This is also the explanation of why we should not confuse a good clear view of the future with a short distance. We can see the perfect outlines of where technology is going, but we tend to overestimate how soon it will come. Usually the delay (in our eager eyes) is due to the invisible ecology of other needed technologies that aren’t ready yet.

they broadly target bacterial cellular processes, like cell wall building, protein synthesis or metabolism.

Well, we know that antibiotic use in early life is associated with a greater risk of developing allergic conditions like asthma1 and irritable bowel disorders2 (IBS) in later life, which is a pretty good reason to care on its own.

Another problem is that your microbiome’s response to antibiotics may be quite different to mine, and at the moment we can’t predict how much.

The microbiomes of different people vary5, there’s no standard ‘set’, so while many groups of bugs share similar biochemical functions and niches, how they respond to antibiotics may differ considerably.

There is a concept in ecology which is useful to illustrate this: keystone species6. Removing a keystone species can create a domino effect where other species that relied on it will disappear, allowing only a few remainder species to dominate, or new species to invade.

There’s good reason to believe antibiotics change the microbiome permanently, and consequentially impact our health.

the central government has targeted the Yangtze River economic corridor -- the urban industrial zones lining the Yangtze River from Chongqing to Shanghai -- as a key area for investment, development and urbanization in the coming years. Ultimately, the Party hopes to transform the Yangtze's main 2,800-kilometer-long (1,700-mile-long) navigable channel into a central superhighway for goods and people, better connecting China's less developed interior provinces to the coast and to each other by way of water -- a significantly cheaper form of transport than road or railway.

Stretching 6,418 kilometers from its source in the Tibetan Plateau to its terminus in the East China Sea, the river both divides and connects the country. To its north lie the wheat fields and coal mines of the North China Plain and Loess Plateau, unified China's traditional political cores. Along its banks and to the south are the riverine wetlands and terraced mountain faces that historically supplied China with rice, tea, cotton and timber.

The river passes through the highlands of the Yunnan-Guizhou Plateau, the fertile Sichuan Basin, the lakes and marshes of the Middle Yangtze and on to the trade hubs of the Yangtze River Delta. Its watershed touches 19 provinces and is central to the economic life of more people than the populations of Russia and the United States combined.

The Yellow River may be the origin of the Han Chinese civilization, but on its own it is far too weak to support the economic life of a great power.

This division, more than any other, forms the basis of Chinese political history and provides China's rulers with their most fundamental strategic imperative: unity of the lands above and below the river. Without both north and south, there is no China, only regional powers.

If the Yangtze did not exist, or if its route had veered downward into South and Southeast Asia (like most of the rivers that begin on the Tibetan Plateau), China would be an altogether different and much less significant place.

the Upper (encompassing present-day Sichuan and Chongqing), Middle (Hubei, Hunan and Jiangxi) and Lower Yangtze (Jiangsu and Zhejiang provinces, as well as Shanghai and parts of Anhui).

Geography and time have made these regions into distinct and relatively autonomous units, each with its own history, culture and language. Each region has its own hubs -- Chengdu and Chongqing for the Upper Yangtze; Wuhan, Changsha and Nanchang for the Middle Yangtze; and Suzhou, Hangzhou and Shanghai for the Lower Yangtze.

In many ways, China was more deeply united under Mao Zedong than under any emperor since Kangxi in the 18th century. After 1978, the foundations of internal cohesion began to shift and crack as the reform and opening process directed central government attention and investment away from the interior (Mao's power base) and toward the coast.

Today, faced with the political and social consequences of that process, the Party is once again working to reintegrate and recentralize -- both in the sense of slowly reconsolidating central government control over key sectors of the economy and, more fundamentally, forcibly shifting the economy's productive core inland.

In 2011, more than 1.6 billion metric tons of goods passed through it, representing 40 percent of the nation's total inland waterborne cargo traffic and about 5 percent of all domestic goods transport that year

First, there is a clear shift in central government policy away from intensive focus on coastal manufacturing at the expense of the interior (the dominant approach throughout the 1990s and early 2000s) and toward better integrating China's diverse regions into a coherent national economy.

By 2001, the economies of Shanghai and Shenzhen, for instance, were in many ways more connected to those of Tokyo, Seoul and Los Angeles than of the hinterlands of Sichuan and Shaanxi provinces.

This continual supply of cheap labor from the interior kept Chinese manufacturing cost-competitive throughout the 2000s -- far longer than if Chinese factories had only had the existing coastal labor pool to rely on.

This dual process -- accumulation of wealth by the state and systematic wage repression in low-end coastal manufacturing -- significantly hampered the development of China's domestic consumer base. But even more troubling was the effect of labor migration, coupled with the relative lack of central government attention to enhancing inland industry throughout the 1990s and early 2000s, on the economies of interior provinces.

In trying to urbanize and industrialize the interior, Beijing is going against the grain of Chinese history -- a multimillennia saga of failed attempts to overcome the radical constraints of geography, population, food supply and culture through ambitious central government development programs.

For the purposes of this article, we’ll focus on the fundamental difference between two major types of life-forms: those that have a cell wall but few or no internal subdivisions, and those that possess cells containing a nucleus, mitochondria, chloroplasts and other smaller substructures, or organelles.

Even before quorum sensing was discovered in V. fischeri, scientists had noted many examples of coordinated action, such as “swarming,” in which a colony of bacteria moves as a unit across a surface, and the development of “fruiting bodies,” in which bacteria glom together to form inert spores as a means of surviving severe environmental conditions.

Bacteria can live solitary lives, of course, but they prefer to aggregate in biofilms, also known as “slime cities.” Biofilms usually form on a surface, whether it’s the inner lining of the intestines or inside water pipes or on your teeth. In these close-knit colonies, bacteria coordinate group production of a slimy translucent coating and fibers called “curli” and “pili” that attach the colony to something else. Biofilms can harbor multiple types of bacteria as well as fungi and protists (microscopic eukaryotes). A complex vascular system for transporting nutrients and chemical signals through a biofilm may also develop. As Tim Friend described in his book The Third Domain, explorers diving to the wreck of the Titanic found these features in “rusticles” — draped colonies of microbes — feeding on the iron in the Titanic‘s hull and skeleton, more than 2 miles under the surface.

in practice, the medical notion of friendly microbes has yet to extend much past the idea that eating yogurt is good for you. For most doctors and medical microbiologists, microbes are enemies in a permanent war. Medicine certainly has good reason to view microbes as dangerous, since the germ theory of disease and the subsequent development of antibiotics are two of medical science’s greatest accomplishments.

When threatened, bacteria become defensive, often producing toxins that make the host even sicker. They also tend to speed up their acquisition of and purging of genes when under external selection pressure, of which antibiotics are an obvious and powerful example.

Gut bacteria play a role in obesity, which affects about a third of American adults.

Research in animals supports the idea that gut bacteria play a role in weight regulation.

bacteria produce some of the same types of neurotransmitters that regulate the function of the human brain.

it’s been known for a while that sick people get depressed and anxious. This seems so obvious as to be a no-brainer, but research suggests that some of the fear and fatigue associated with infections stems from immune responses affecting the brain.

As it turns out, however, very few bacteria can be grown in the relatively austere conditions of laboratories. In fact, only about 0.1 percent of all bacteria are currently culturable. Many bacteria don’t do well in monoculture, preferring to live in mixed communities of microorganisms. Those living in extreme temperatures and pressures require very specialized equipment to grow in a typical lab.

In fact, they wrote, the genes that enable these processes today “may have been distributed across a common global gene pool, before cellular differentiation and vertical genetic transmission evolved as we know it today.”

The grand story of human exceptionalism — the idea that humans are separate from and superior to everything else in the biosphere — has taken a terminal blow from the new knowledge about bacteria. Whether humanity decides to sanctify them in some way or merely admire them and learn what they’re really doing, there’s no going back.

Broadcast news has been outflanked and will soon be overtaken by scores of other media options. The need for clear, objective reporting in a world of rising religious fundamentalism, economic interdependence and global ecological problems is probably greater than it has ever been. But we are no longer a national audience receiving news from a handful of trusted gatekeepers; we're now a million or more clusters of consumers, harvesting information from like-minded providers.

I would say we were marked by two traits: our dislike of nostalgia and our irritation whenever our barely formed narratives were appropriated and marketed back at us.

Meanwhile MTV is exhuming “Beavis and Butt-head” and “Pop-Up Video,” while Nickelodeon is offering a 1990s-themed block of late-night programming with old shows like “The Adventures of Pete & Pete,” presumably to help herbally sautéed 20-somethings regress in giggly reminiscence.

But of course we are not just the unwilling victims of the 20-year cycle of resuscitation. We are its architects, as a few of us have been able to wrest culturally influential posts away from baby boomers.

At that time, the sharpest articulation of generational pique was found in The Baffler

Now we’ll get to see how The Baffler dissects the rise of Gen-X-Squared

age can prompt even the most cynical to realize not only nostalgia’s sickly-sweet temptation but also its usefulness.

it runs search-and-rescue missions against the disposability of consumer capitalism

And it raises exception to the great leveling effect of the Internet

Today’s Birthers and Tea Partiers seem less apocalyptic if you remember that the last time a Democratic president battled Republicans over health care and federal budgets, he was being smeared as a conspiratorial murderer.

So how can an anti-nostalgic generation honor its past without becoming the thing it hated?

The leading explanation for the extinction invokes extended, climate-altering volcanic activity caused by splitting continental plates, but earlier research by Ruhl suggested a more nuanced and jarring narrative.

“A small release of CO2 from volcanoes triggered a small change in the global climate, raising land and ocean temperatures. That led to the release of methane from the seafloor,” said Ruhl.

Scientists have raised the possibility that rising global temperatures could release trapped methane into the atmosphere, further raising temperatures and releasing more methane in a feedback loop of warming and planetary disruption. That’s apparently what happened during the end-Triassic extinction.

Exactly how much warming would be needed to start the loop anew, and how much methane would flow forth, are open questions. “We could potentially trigger a small increase in ocean temperatures, which triggers methane release,” said Ruhl. “But it’s difficult to quantify how much methane is in the ocean these days. Maybe we have less methane in seafloors now. Maybe we have more.”