how aliens could be hiding in plain site

There’s always that puzzle – if conditions were such that life could arise on this planet, and the universe is so vast that there must be similar conditions out there, and given the unfathomable amounts of time for that to happen, is it really likely or even possible that this is the only place it ever happened? And if life is actually common, how could it be that we have never detected it? One answer to the puzzle would be if sophisticated life is out there, even relatively nearby, and doesn’t want to be detected by us for some reason.

Serious people at serious universities like Columbia study this, the technology side at least if not the existential questions. If aliens are hiding from us right now, here’s one way they might be doing it. Or if we thought there was somebody bad out there (one of those infinitesimal probability, infinite consequence risks that are hard to wrap your head around) and wanted to hide, here is how we could try to do it.

A Cloaking Device for Transiting Planets

The transit method is presently the most successful planet discovery and characterization tool at our disposal. Other advanced civilizations would surely be aware of this technique and appreciate that their home planet’s existence and habitability is essentially broadcast to all stars lying along their ecliptic plane. We suggest that advanced civilizations could cloak their presence, or deliberately broadcast it, through controlled laser emission. Such emission could distort the apparent shape of their transit light curves with relatively little energy, due to the collimated beam and relatively infrequent nature of transits. We estimate that humanity could cloak the Earth from Kepler-like broadband surveys using an optical monochromatic laser array emitting a peak power of ∼30 MW for ∼10 hours per year. A chromatic cloak, effective at all wavelengths, is more challenging requiring a large array of tunable lasers with a total power of ∼250 MW. Alternatively, a civilization could cloak only the atmospheric signatures associated with biological activity on their world, such as oxygen, which is achievable with a peak laser power of just ∼160 kW per transit. Finally, we suggest that the time of transit for optical SETI is analogous to the water-hole in radio SETI, providing a clear window in which observers may expect to communicate. Accordingly, we propose that a civilization may deliberately broadcast their technological capabilities by distorting their transit to an artificial shape, which serves as both a SETI beacon and a medium for data transmission. Such signatures could be readily searched in the archival data of transit surveys.

the path to water innovation

Brookings has a new paper called The Path to Water Innovation. Here’s an excerpt:

The primary barriers to innovation are related to the way that the many layers of governmental agencies and water entities manage the nation’s water sector. Among the main management and policy barriers are (1) unrealistically low water pricing rates; (2) unnecessary regulatory restrictions; (3) the absence of regulatory incentives; (4) lack of access to capital and funding; (5) concerns about public health and possible risks associated with adopting new technologies with limited records; (6) the geographical and functional fragmentation of the industry; and (7) the long life expectancy, size, and complexity of most water systems. Although the last three factors are inherent to the water sector and hard to change, substantial policy reforms are feasible that could alter pricing, regulation, and finance in the water sector—all in ways that would encourage innovation.

We focus on several recommendations: (1) pricing policies that would both better align with the full economic cost of supplying water and decouple revenues from the volume of water supplied; (2) regulatory frameworks to create an open and flexible governance environment that is innovation friendly and encourages valuable new technologies; and (3) financing and funding mechanisms, such as a public benefit charge on water, that can help raise sufficient funds to implement innovative solutions. As has been demonstrated in the clean energy sector, implementation of these policy reforms would facilitate greater innovation in the water sector. In addition, we recommend the creation of a state-level water innovation vision that would identify state-specific innovation opportunities and policies, along with state innovation offices to help implement the vision across the many varied agencies and firms relevant to the sector. While we expect these state water innovation offices would become common, a small group of states with the greatest water challenges—such as California, Florida, and Texas, or a consortium of like-challenged states in a region such as the West—would begin the process. Based on the lessons learned, other states could follow.

“why we lost” Iraq and Afghanistan

Daniel Bolger is a retired U.S. general who has written a book about why he thinks the U.S. lost these two wars.

Why exactly did American military leaders get so much so wrong? Bolger floats several answers to that question but settles on this one: With American forces designed for short, decisive campaigns, the challenges posed by protracted irregular warfare caught senior officers completely by surprise.

Since there aren’t enough soldiers — having “outsourced defense to the willing,” the American people stay on the sidelines — the generals asked for more time and more money. This meant sending the same troops back again and again, perhaps a bit better equipped than the last time. With stubbornness supplanting purpose, the military persisted, “in the vain hope that something might somehow improve.”

Toward what end? Bolger reduces the problem to knowing whom to kill. “Defining the enemy defined the war,” he writes. But who is the enemy? Again and again, he poses that question, eventually concluding, whether in frustration or despair, that the enemy is “everyone.”

Well, if you can’t figure out who you are fighting or why, it is not likely that you will ever be able to say you accomplished your objective. These were really wars fought for no obvious reason, and blowback may only be starting. Hopefully lessons were learned.

Antarctica, it was nice knowing you

Thank you, Eric Holthaus, for your entertaining, mildly sensational climate change coverage at Slate.

In a study released Wednesday, a new estimate of how much Antarctic ice would melt in a warmer world nearly doubles previous projections of sea level rise by the end of the century. And it might be even worse than that: The study did not explore the true worst-case scenario, and its lead author said the work is still incomplete. Taken together with recent results from other research teams—most notably James Hansen’s, just last week—it’s increasingly clear that consensus projections of near-term sea level rise, about three feet in the next 85 years, are likely an underestimate.

The latest information comes via a breakthrough in simulating the behavior of Antarctica’s vast and complex network of glaciers and ice shelves. That’s brought a more complete understanding of how warmer air temperatures—projected to surpass those regularly experienced on Earth at any point during at least the last few million years—are affecting the sea level. At the same time, the study provides new certainty that—should the world act immediately to curb carbon emissions at a scale far beyond current efforts—virtually all Antarctic ice melt could be avoided.

Runaway Inequality

Les Leopold is a guy who wrote a book called Runaway Inequality: An Activist’s Guide to Economic Justice. Here’s an excerpt from an interview about the book:

In the late ’70s, roughly, a new economic philosophy really caught hold in both political parties. It originally came from the right, from Milton Friedman and the free marketeers. Academics call it neoliberalism; in the book, we call it the “Better Business Climate.”

It basically was kind of a simple model. Cut taxes, cut regulations, cut back social spending so people will be more eager to find work and be less dependent on the government, and basically undermine the power of labor unions so the economy would run more on market principles and have less inefficiencies in it. There would be more investment and profits, and therefore, all boats would rise. It would lead to kind of a boom economy. That was the theory. I was in graduate school when that was going on, and it was pretty strong, even more liberal economists were sort of giving up on Keynesianism and going in this direction.

What they didn’t teach us and what they never discussed is that it’s one thing to deregulate trucking or airlines or telecommunications, but it’s quite another thing to deregulate the financial sector… In 1980, about two percent of a company’s profits were used for stock buybacks. By 2007, 75 percent of all corporate profits were used to buy back their own shares. Forget about R&D, forget about workers’ wages, forget about all that kind of stuff. All that matters to a CEO today is raising the prices of the shares through stock buybacks.

The mantra makes some logical sense – capitalism is about competition to create better products at better prices and operate efficiently in the short term, and a necessity to innovate if you want to compete in the long term. Consumers are supposed to win. Profit and stock price are supposed to be the score card that determines which companies are winning, and the possibility of winning is the incentive to play the game. This all makes some sense, unless and until people are gaming the system to such an extent it is not really competition any more.

Oculus Rift

Here’s an interview with the creator of the Oculus Rift, Palmer Luckey:

Luckey argues that virtual reality is a bigger turning point in technology than Apple II, Netscape or Google. VR, he says, is the final major computing platform that’s not a transitional step to the next big thing.

“If you have perfect virtual reality eventually, where you’re be able to simulate everything that a human can experience or imagine experiencing, it’s hard to imagine where you go from there,” Luckey tells NPR’s Kelly McEvers. “If you have perfect virtual reality, what else are you supposed to perfect?” …

Things like email, and Twitter, and Facebook, and text messaging — they all work reasonably well. But we use them because they’re convenient, and cheap, and easy, not because they’re the best way to communicate with somebody. Today, the best way to communicate with someone is still face-to-face. Virtual reality has the potential to change that, to make it where VR communication is as good or better than face-to-face communications, because not only do you get all the same human cues of face-to-face communication, you can basically suspend the laws of physics, you can do whatever you want, you can be wherever you want.

 

Menino Survey of Mayors

The Menino Survey of Mayors is a survey where mayors are surveyed. Basically they say they need help with infrastructure, and they complain that states are useless at best and anti-city at worst.

It would make sense to have some kind of infrastructure planning at the scale of the metropolitan area. If a metro area could agree on a planning body to represent it, and that planning body could come up with a truly comprehensive infrastructure plan, the federal government could bypass the state and pass funding directly along to that body for implementation. An infrastructure bank, part of the Federal Reserve or alongside it, could issue infrastructure bonds as part of the country’s monetary policy – invest when the private sector is underinvesting and the overall economy is lagging, and let the private sector play as large a role as it is willing to when the economy is strong. This shouldn’t be controversial – there is a near-consensus among economists that expanding infrastructure spending would be a win-win for jobs and economic growth.

This wouldn’t have to mean states would be completely obsolete. They could do the planning and implementation for the infrastructure that connects the metro areas together, and for agriculture policy and the infrastructure that brings agricultural goods to market. Their political power could be equal to a metro area in proportion to the people they represent, not the empty land they represent.

Changing the balance of power on paper between the federal government, states, and cities might require constitutional changes. But create the infrastructure bank and the funding mechanisms might change the practical balance pretty quickly.

March 2016 in Review

3 most frightening stories

3 most hopeful stories

3 most interesting stories

‘Beyond: Our Future in Space,’ by Chris Impey

This is a new book about the potential for space colonization.

Its concluding section presents a scattered but sweeping vision for our future in space, and offers more plausible ideas than can be found in whole shelves of futuristic science fiction. Want to construct a lunar base, or mine asteroids for precious resources? Are you looking for alien life in our solar system, or habitable planets around other stars? Impey covers all this and much, much more in a brilliantly brisk series of chapters intended to show how we might someday become not only an interplanetary species but also an interstellar one.

Such a leap would be far more epochal than that of the Apollo moon landings, Impey notes. If Earth were the size of a Ping-Pong ball, the marble-size moon would be only a yard away — and the nearest neighboring star system would be 30,000 miles distant. Though that distance may now seem insurmountable, Impey implores us to consider the possibility of crossing it, even if only to grasp how far we have come since our ancestors spread out of Africa, and how far we still must go in securing a legacy for our distant descendants.

Someday, the sun and Earth will perish, but humanity may have the choice to be “more than a footnote in the history of the Milky Way.” Contemplating this future “and the possibility that we might not exist at all, is as haunting as deep space,” Impey writes.

The book review makes some references to H.G. Wells’ 1902 essay series Anticipations, which I might get around to reading some day.