lead, crime and teen pregnancy

Leaded gasoline peaked around the year I was born, and both crime and teen pregnancy peaked while I was a teenager. I managed to steer clear of these two things (or maybe I left no evidence in either case…), but maybe I would have been the next Einstein if it weren’t for lead, we’ll never know.

Lead Exposure and Behavior: Effects on Antisocial and Risky Behavior among Children and Adolescents Jessica Wolpaw Reyes NBER Working Paper No. 20366 August 2014

It is well known that exposure to lead has numerous adverse effects on behavior and development. Using data on two cohorts of children from the NLSY, this paper investigates the effect of early childhood lead exposure on behavior problems from childhood through early adulthood. I find large negative consequences of early childhood lead exposure, in the form of an unfolding series of adverse behavioral outcomes: behavior problems as a child, pregnancy and aggression as a teen, and criminal behavior as a young adult. At the levels of lead that were the norm in United States until the late 1980s, estimated elasticities of these behaviors with respect to lead range between 0.1 and 1.0.

Maybe we learned our lesson with lead and mercury and have moved on. Or maybe something as bad or worse is hiding in plain site in our consumer products and we just haven’t figured it out yet.

Just for the archives, here is a key 2000 study by Rick Nevin on the subject: How Lead Exposure Relates to Temporal Changes in IQ, Violent Crime, and Unwed Pregnancy.

This study compares changes in children’s blood lead levels in the United States with subsequent changes in IQ, based on norm comparisons for the Cognitive Abilities Test (CogAT) given to representative national samples of children in 1984 and 1992. The CogAT norm comparisons indicate shifts in IQ levels consistent with the blood lead to IQ relationship reported by an earlier study and population shifts in average blood lead for children under age 6 between 1976 and 1991. The CogAT norm comparisons also support studies indicating that the IQ to blood lead slope may increase at lower blood lead levels. Furthermore, long-term trends in population exposure to gasoline lead were found to be remarkably consistent with subsequent changes in violent crime and unwed pregnancy. Long-term trends in paint and gasoline lead exposure are also strongly associated with subsequent trends in murder rates going back to 1900. The Andings on violent crime and unwed pregnancy are consistent with published data describing the relationship between IQ and social behavior. The Andings with respect to violent crime are also consistent with studies indicating that children with higher bone lead tend to display more aggressive and delinquent behavior. This analysis demonstrates that widespread exposure to lead is likely to have profound implications for a wide array of socially undesirable outcomes.

fish-free fish food

With wild fish reserves more and more depleted, fish farming seems like a more sustainable and downright necessary alternative. And it has gotten huge. The problem though, as this Wired article explains, is that the food given to farmed fish is also made from wild fish. In this case, the smaller ones like anchovies that people don’t eat as much. So not only have humans sifted out most of the big fish, we are now vacuuming up the small ones that form the base of the wild food web for all the other creatures in the sea. There are some attempt to develop alternatives such as “feed made from seaweed extracts, yeast, and algae grown in bioreactors”. Basically, if humans are not going to go vegetarian, which might be the most sustainable option of all, we can at least try to eat vegetarian fish.

Fish meal—dried and ground up fish bits—and its more lubricious counterpart, fish oil, are made from cheap species that humans don’t eat that much: sardines, herring, anchovies, krill. But lots of other ocean animals do eat them; they’re kind of the linchpin of marine ecosystems. Lose the forage fish, lose a lot more. And as those forage fish catches are getting smaller, fish meal and oil-based diets are getting more expensive. Since 2012, prices have risen more than 80 percent. “Aquaculture is growing so fast that it can’t possibly continue to use any more,” says Kevin Fitzsimmons, a biologist at the University of Arizona and former president of the World Aquaculture Society. “Forage fish are just maxed out…”

Any kind of plant- or algae-based feed still relies on photosynthesis, and that requires surface area on the Earth, unless and until we go to all artificial light in high rises or in orbit powered by something like nuclear power. Yeast is interesting because it doesn’t require photosynthesis, only some kind of organic input. But if we hit the limit caused by the Earth’s footprint, then go to a technology that is not limited by Earth’s footprint, we will just tend to expand until we hit another limit. And our original natural ecosystems get completely lost somewhere along the way, if they have not been already.

how a U.S.-China war could happen

A full-blown U.S.-China war seems so stupid for both countries and the entire world as to be unthinkable. But it is thinkable because both countries may think they have something to gain from brinksmanship, and the Trump administration seems willing to take a lot of risks and to be unlikely to back down. Here is a scenario described in Foreign Policy:

Consider the testimony offered by Trump’s Secretary of State pick Rex Tillerson, former CEO of ExxonMobil, in his Senate confirmation hearing on Jan. 11, as he warned of a more confrontational South China Sea policy: “We’re going to have to send China a clear signal that, first, the island-building stops and, second, your access to those islands also is not going to be allowed.” There are only so many ways the Trump team can go about sending such signals given its vow to withdraw the United States from the Trans-Pacific Partnership (TPP), which America’s allies had been hoping the United States would complete. By preemptively eliminating tools like economic statecraft from its foreign-policy toolbox, the Trump administration will be leaving itself with only hard power to counteract China’s ambitions. That would probably mean an attempted military blockade against the Chinese navy in the South China Sea…

Trump’s demonstrated willingness to toss out the rulebook on the one-China policy, with his phone call with Taiwanese President Tsai Ing-wen, has already ratcheted up tensions with Beijing to a level not seen since 1996, when President Bill Clinton sent two carrier battle groups through the Taiwan Strait. The passage of China’s Liaoning aircraft carrier through the Taiwan Strait at the end of December was largely interpreted as a stern indictment directed at Taipei and the incoming Trump administration. The carrier group then transited past Okinawa, which hosts more than half of the 50,000 American troops in Japan, into the South China Sea. A simultaneous op-ed appearing in China’s state-affiliate mouthpiece, the Global Times, warned, “If the fleet is able to enter areas where the US has core interests, the situation when the US unilaterally imposes pressure on China will change…”

Moving more U.S. naval assets into the Pacific will add to Beijing’s perceptions of U.S. containment while increasing the odds that a minor accident or hostile encounter could trigger armed conflict. One could imagine China deploying underwater submarine detection defenses in the South or East China Sea to monitor U.S. Navy movements. If Washington were to seek to destroy these assets to preempt Chinese primacy or look to extend American military superiority in the region, Beijing would feel compelled to retaliate. Trump’s team might then be tempted to think a shocking use of force could deter Beijing from escalating conflict. It’s not clear at what point Trump would decide the costs of conflict outweigh the benefits of winning such a clash.

peak bacon?

This headline in USA Today says Nation’s bacon reserves hit 50-year low as prices rise. That pretty much covers it. The reason is not lack of supply but increased foreign demand.

In December 2016, frozen pork belly inventory totaled 17.8 million pounds, the lowest level since 1957, according to the U.S. Department of Agriculture.

As a result, prices are on the rise. The council reports pork belly prices have increased 20 percent in January. Officials said increased foreign demand might account for the decline in inventory. Hog farmers export approximately 26 percent of total productions, the council said.

free trade and big ag

When I think of the controversial side of trade, I tend to think of manufactured goods being produced cheaply abroad and imported to the U.S. But there is also a huge global trade in food and agriculture, and the U.S. is a huge player in it, both in exports and imports. It is not only big business but big politics too. This industry has lobbied heavily for trade deals like NAFTA and TPP. This Mother Jones article has a lot of interesting facts and figures. Okay, maybe Mother Jones is not a completely apolitical non-partisan voice, but this article has a lot of links you can follow up on if you want to draw your own conclusions from the raw data.

It’s interesting, we have a nominally business-friendly administration elected by voters in rural states that seems hostile to the priorities of politicians bought and paid for by the biggest and most powerful business lobby in those same rural states.

Silicon Valley Preppers

I don’t love this New Yorker article all that much, because it is mostly a bunch of anecdotes strung together with the opinions of “high net worth individuals”, as though we should care more about their opinions than the opinions of other people. I don’t. But the article had a few interesting parts, including this description of a “the Survival Condo Project, a fifteen-story luxury apartment complex built in an underground Atlas missile silo” in Kansas.

The original silo of Hall’s complex was built by the Army Corps of Engineers to withstand a nuclear strike. The interior can support a total of seventy-five people. It has enough food and fuel for five years off the grid; by raising tilapia in fish tanks, and hydroponic vegetables under grow lamps, with renewable power, it could function indefinitely, Hall said. In a crisis, his swat-team-style trucks (“the Pit-Bull VX, armored up to fifty-calibre”) will pick up any owner within four hundred miles. Residents with private planes can land in Salina, about thirty miles away…

The complex is a tall cylinder that resembles a corncob. Some levels are dedicated to private apartments and others offer shared amenities: a seventy-five-foot-long pool, a rock-climbing wall, an Astro-Turf “pet park,” a classroom with a line of Mac desktops, a gym, a movie theatre, and a library. It felt compact but not claustrophobic. We visited an armory packed with guns and ammo in case of an attack by non-members, and then a bare-walled room with a toilet. “We can lock people up and give them an adult time-out,” he said. In general, the rules are set by a condo association, which can vote to amend them. During a crisis, a “life-or-death situation,” Hall said, each adult would be required to work for four hours a day, and would not be allowed to leave without permission. “There’s controlled access in and out, and it’s governed by the board,” he said.

The “medical wing” contains a hospital bed, a procedure table, and a dentist’s chair.

It’s easy for me to say “no thanks” since, not being a “high net worth individual”, this is not an option for me. But even if I were sitting on a billion dollars I don’t think I would be interested in this.

de-extinction

Here’s the Amazon description of a new (to me) book called Bring Back the King: The New Science of De-extinction.

If you could bring back just one animal from the past, what would you choose? It can be anyone or anything from history, from the King of the Dinosaurs, T. rex, to the King of Rock ‘n’ Roll, Elvis Presley, and beyond.

De-extinction, the ability to bring extinct species back to life is fast becoming reality. Around the globe, scientists are trying to de-extinct all manner of animals, including the woolly mammoth, the passenger pigeon and a bizarre species of flatulent frog. But de-extinction is more than just bringing back the dead. It’s a science that can be used to save species, shape evolution and sculpt the future of life on our planet.

In Bring Back the King, scientist and comedy writer Helen Pilcher goes on a quest to identify the perfect de-extinction candidate. Along the way, she asks if Elvis could be recreated from the DNA inside a pickled wart, investigates whether it’s possible to raise a pet dodo, and considers the odds of a 21st century Neanderthal turning heads on public transport.

Pondering the practicalities and the point of de-extinction, Bring Back the King is a witty and wry exploration of what is bound to become one of the hottest topics in conservation if not in science as a whole in the years to come.

interspecies chimerism, or Dr. Moreau returns

I only understand a few words of this paper in Cell, like “human”, “pig”, “embryo”, and “implantation”, but they are enough to raise both my eyebrows. I’ll quote the last paragraph of the paper rather than the abstract because it contains a little less jargon. There are some understandable, or possibly hair-raising depending on your point of view, pictures in the paper too.

Interspecies Chimerism with Mammalian Pluripotent Stem Cells. Wu, Jun et al. Cell, Volume 168 , Issue 3 , 473 – 486

The procedures and observations reported here on the capability of human pluripotent stem cells to integrate and differentiate in a ungulate embryo, albeit at a low level and efficiency, when optimized, may constitute a first step towards realizing the potential of interspecies blastocyst complementation with hPSCs. In particular, they may provide a better understanding of human embryogenesis, facilitate the development and implementation of humanized animal drug test platforms, as well as offer new insights on the onset and progression of human diseases in an in vivo setting. Ultimately, these observations also raise the possibility of xeno-generating transplantable human tissues and organs towards addressing the worldwide shortage of organ donors.

Of course rich people are going to have copies of all their vital organs cloned in pigs as soon as this technology is available. And some mad dictator or Bond villain on an island somewhere is going to be breeding pig people. Now speaking of madmen on islands, there was a story about a certain Dr. Moreau…but it was only a story, right?

 “Monsters manufactured!” said I. “Then you mean to tell me—”

“Yes. These creatures you have seen are animals carven and wrought into new shapes. To that, to the study of the plasticity of living forms, my life has been devoted. I have studied for years, gaining in knowledge as I go. I see you look horrified, and yet I am telling you nothing new. It all lay in the surface of practical anatomy years ago, but no one had the temerity to touch it. It is not simply the outward form of an animal which I can change. The physiology, the chemical rhythm of the creature, may also be made to undergo an enduring modification,—of which vaccination and other methods of inoculation with living or dead matter are examples that will, no doubt, be familiar to you. A similar operation is the transfusion of blood,—with which subject, indeed, I began. These are all familiar cases. Less so, and probably far more extensive, were the operations of those mediaeval practitioners who made dwarfs and beggar-cripples, show-monsters,—some vestiges of whose art still remain in the preliminary manipulation of the young mountebank or contortionist. Victor Hugo gives an account of them in ‘L’Homme qui Rit.’—But perhaps my meaning grows plain now. You begin to see that it is a possible thing to transplant tissue from one part of an animal to another, or from one animal to another; to alter its chemical reactions and methods of growth; to modify the articulations of its limbs; and, indeed, to change it in its most intimate structure.

“And yet this extraordinary branch of knowledge has never been sought as an end, and systematically, by modern investigators until I took it up! Some of such things have been hit upon in the last resort of surgery; most of the kindred evidence that will recur to your mind has been demonstrated as it were by accident,—by tyrants, by criminals, by the breeders of horses and dogs, by all kinds of untrained clumsy-handed men working for their own immediate ends. I was the first man to take up this question armed with antiseptic surgery, and with a really scientific knowledge of the laws of growth. Yet one would imagine it must have been practised in secret before. Such creatures as the Siamese Twins—And in the vaults of the Inquisition. No doubt their chief aim was artistic torture, but some at least of the inquisitors must have had a touch of scientific curiosity.”

“But,” said I, “these things—these animals talk!”

He said that was so, and proceeded to point out that the possibility of vivisection does not stop at a mere physical metamorphosis. A pig may be educated. The mental structure is even less determinate than the bodily. In our growing science of hypnotism we find the promise of a possibility of superseding old inherent instincts by new suggestions, grafting upon or replacing the inherited fixed ideas. Very much indeed of what we call moral education, he said, is such an artificial modification and perversion of instinct; pugnacity is trained into courageous self-sacrifice, and suppressed sexuality into religious emotion. And the great difference between man and monkey is in the larynx, he continued,—in the incapacity to frame delicately different sound-symbols by which thought could be sustained. In this I failed to agree with him, but with a certain incivility he declined to notice my objection. He repeated that the thing was so, and continued his account of his work.

I asked him why he had taken the human form as a model. There seemed to me then, and there still seems to me now, a strange wickedness for that choice.

He confessed that he had chosen that form by chance. “I might just as well have worked to form sheep into llamas and llamas into sheep. I suppose there is something in the human form that appeals to the artistic turn more powerfully than any animal shape can.