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A FUNNY thing has happened in the United States over the last few decades. Men’s average testosterone levels have been dropping by at least 1 percent a year

Testosterone appears to decline naturally with aging, but internal belly fat depresses the hormone further, especially in obese men. Drugs like steroids and opiates also lower testosterone, and it’s suspected that chemicals like bisphenol A (or BPA, commonly found in plastic food containers) and diseases like Type 2 diabetes play a role as well.

Clinical testosterone deficiency, which is variously defined as lower than 220 to 350 nanograms of testosterone per deciliter of blood serum, can cause men to lose sex drive and fertility. Their bone density often declines, and they may feel tired and experience hot flashes and sweats.

task that took you a couple seconds to complete is a task that computers -- despite decades of advancement and intricate calculations -- still can't perform as efficiently as humans: the visual search.

"Our daily lives are comprised of little searches that are constantly changing, depending on what we need to do," said Miguel Eckstein, UC Santa Barbara professor of psychological and brain sciences. "So the idea is, where does that take place in the brain?"

What Eckstein and co-authors wanted to determine was how we decide whether the target object we are looking for is actually in the scene, how difficult the search is, and how we know we've found what we wanted.

With colleagues at the University of Cambridge, I worked on a web game called urbangems.org. In it, you are shown 10 pairs of urban scenes of London, and for each pair you need to choose which one you consider to be more beautiful, quiet and happy. Based on user votes, one is able to rank all urban scenes by beauty, quiet and happiness. Those scenes have been studied at Yahoo Labs, image processing tools that extract colour histograms. The amount of greenery is associated with all three peaceful qualities: green is often found in scenes considered to be beautiful, quiet and happy. We then ran more sophisticated image analysis tools that extracted patches from our urban scenes and found that red-brick houses and public gardens also make people happy.

On the other hand, cars were the visual elements most strongly associated with sadness. In rich countries, car ownership is becoming unfashionable, and car-sharing and short-term hiring is becoming more popular. Self-driving cars such as those being prototyped by Google will be more common and will be likely to be ordered via the kind of mobile apps similar to the ones we use for ordering taxis nowadays. This will result into optimised traffic flows, fewer cars, and more space for alternative modes of transportation and for people on foot.

Cities will experience transformations similar to those New York has experienced since 2007. During these few years, new pedestrian plazas and hundreds of miles of bike lanes were created in the five boroughs, creating spaces for public art installations and recreation. And it’s proved popular with local businesses too, boosting the local economy in areas where cyclists are freer to travel.

Are there things we should try not to know?

IBM says that 2.5 quintillion bytes of data are created each day. That is a number both unimaginable and somewhat unhelpful to real understanding. It’s not just the huge scale of the information, after all, it’s the novel types of data

many participants expressed concern about the effects all this data would have on the ability of powerful institutions to control people, from state coercion to product marketing.

"You are what you eat." But could what we eat also affect how we think?

eating a healthy diet could potentially be linked to a lower risk of memory and thinking decline

a higher diet quality could have on reducing the risk of memory loss.

Majid, who gave only his first name to protect his safety, collected hair and urine samples, clothing, tree leaves, soil and even a dead bird. He shared it with the Syrian American Medical Society, a humanitarian group that had been delivering such samples to American intelligence officials, as proof of possible chemical attacks.

United Nations inspectors have taken the first steps to destroy Syria’s chemical stockpile.

Many Syrian doctors have fled; those who remain describe dire conditions where even the most basic care is not available.

In partisan terms, the growth of secrecy in campaign finance has been driven by the political right, as shown in the graphic at Figure 2. Of the $310.8 million in total political spending by nondisclosing groups in 2011-12, $265.2 million, or 85.5 percent, was spent by conservative, pro-Republican organizations (red in the pie chart), and $10.9 million, or 11.2 percent, was spent by liberal, pro-Democratic organizations (blue in the chart).

“The rationale behind donor anonymity, which is a form of First Amendment speech, is to protect against the threat of retaliation when someone or some group takes a stand, espouses their point of view or articulates a position on issues that may (or may not) be popular with the general public or the political party in majority power. There are many precedents to this: the Federalist Papers were published under pseudonyms and financed anonymously, out of fear of retribution.”

do you have a principled answer to the argument that efforts to influence the political and policy-making process should be as transparent and open as possible because voters deserve to know who is trying to persuade them to take stands on issues of major public importance? More simply: Is transparency an essential ingredient of democracy? What overrides transparency?

Ask city-dwellers to describe what, precisely, gentrification is you’ll get an array of answers. The term is a murky one, used to describe the many different ways through which money and development enter poorer or less developed neighborhoods, changing them both economically and demographically.

For some, gentrification and gentrifiers are inherently bad—pushing out residents who are often older, poorer, and darker than the neighborhood’s new occupants. For others, a new group of inhabitants brings the possibility of things residents have long hoped for, better grocery stores, new retail, renovations, and an overall revitalization that often eludes low-income neighborhoods.

The first thing that comes to mind is what Steven Chu, the architect, said at the end of his chapter, where he commented that language evolves and land evolves as well.

On April 8, 1966, Time magazine carried a lead story for which the cover was completely black except for three words emblazoned in bright, red letters against the dark background: “IS GOD DEAD?” The story described the so-called ‘Death of God’ movement then current in American theology. But, to paraphrase Mark Twain, it seemed that the news of God’s demise was “greatly exaggerated.” For at the same time that theologians were writing God’s obituary, a new generation of young philosophers was re-discovering His vitality.

Back in the 1940s and ’50s it was widely believed among philosophers that any talk about God is meaningless, since it is not verifiable by the five senses.

Its downfall meant a resurgence of metaphysics, along with other traditional problems of philosophy which Verificationism had suppressed. Accompanying this resurgence came something altogether unanticipated: a renaissance of Christian philosophy.

The problem with these makeshift laws and contested rules is that they inject a dose of unpredictability into the market precisely when it needs reassurance. Instead of calming our frazzled nerves, these provisions make it even harder to plan. And that is a very dangerous thing, as the mere whiff of uncertainty can dramatically skew our decision-making.

New regulations have also increased market uncertainty.

impact of uncertainty on decision-making processes in the brain. A recent experiment by neuroeconomists at the California Institute of Technology used a simple gambling game in which people bet on whether the next card drawn from a deck of 20 cards would be red or black.

based on our ever-growing knowledge of brain physiology and habit formation.   He can fix himself; it is absolutely within the realm of the possible.  But he won't do it by thinking about himself; he needs to externalize.  Contra Freud, insight alone rarely solves much, and a constant focus on oneself and one's problems, especially for people who are depressed, tends to make things worse in the absence of concommitant specific cognitive and/or behavioral strategies for change

focus on doing something for someone or something outside of himself, sounds counter-intuitive and Pollyanna-ish, if not outright cruel.  And yet...  his neuronal pathways tending towards depressing, defeatist self-references have obviously been over-enriched at the expense of, well, everything else.  So he's got to change that. These things are plastic, and literally grow or shrink depending on usage.  

He needs physical activity directed towards an external goal; not doing something for himself (although he will be), but for other people, animals, the planet, a political cause, neighborhood clean-up - whatever.  Once he finds that cause and starts working, setting goals (however small) to accomplish in that cause, and accomplishing them, the energy itself will build and grow, just like his non-depressive cognitive patterns.  And every time he finds himself thinking negative, defeatist thoughts, he should imagine one of those giant red stop signs and STOP!  It's another habit to develop, and gets easier and more effective every time he tries it.  

a number of "social X-ray specs" that are set to transform how we interact with each other. By sensing emotions that we would otherwise miss, these technologies can thwart disastrous social gaffes and help us understand each other better.

In conversation, we pantomime certain emotions that act as social lubricants. We unconsciously nod to signal that we are following the other person's train of thought, for example, or squint a bit to indicate that we are losing track. Many of these signals can be misinterpreted - sometimes because different cultures have their own specific signals.

n 2005, she enlisted Simon Baron-Cohen, also at Cambridge, to help her identify a set of more relevant emotional facial states. They settled on six: thinking, agreeing, concentrating, interested - and, of course, the confused and disagreeing expressions

THE Republican presidential field has become a showcase of evangelical anti-intellectualism. Herman Cain, Rick Perry and Michele Bachmann deny that climate change is real and caused by humans. Mr. Perry and Mrs. Bachmann dismiss evolution as an unproven theory.

In response, many evangelicals created what amounts to a “parallel culture,” nurtured by church, Sunday school, summer camps and colleges, as well as publishing houses, broadcasting networks, music festivals and counseling groups.

Fundamentalism appeals to evangelicals who have become convinced that their country has been overrun by a vast secular conspiracy; denial is the simplest and most attractive response to change.

data-driven style of politics is built on a questionable philosophy and a set of dubious assumptions. Data-driven politics is built on a philosophy you might call Impersonalism. This is the belief that what matters in politics is the reaction of populations and not the idiosyncratic judgment, moral character or creativity of individuals.

Data-driven politics assumes that demography is destiny, that the electorate is not best seen as a group of free-thinking citizens but as a collection of demographic slices.

This method assumes that mobilization is more important than persuasion; that it is more important to target your likely supporters than to try to reframe debates or persuade the whole country.

Roughly 66% said they have read text messages while waiting at a stop sign or red light, while another 25% defended their texting-while-driving habits because they think they "can easily do several things at once, even while driving."

Distracted drivers on their phones caused more than 1.3 million crashes in 2011. And you'll see tragic stories in the news practically every day involving accidents because a driver was texting. 

"Why do some people love cilantro and others say it tastes like soap? Why do some people have perfect pitch and others are tone deaf? It's the same with vision — our sensory apparatus is fine tuned,"

The cones in our retinas — the fine layer of nerve tissue that lines the back of our eyes — detect the blue, green, and red in an image. The cones and your brain mix those colors to make other colors.

"Ninety-nine percent of the time, we'll see the same colors," Haller says. "But the picture of this dress seems to have tints that hit the sweet spot that's confusing to a lot of people."

ost of us do it, but few of us will admit to it. If we get caught red-handed, we experience shame and regret. And we tend to frown upon others when they do it in public.

Is nose-picking really all that bad? How prevalent or bad is it, really?

Andrade and Srihari compiled data from 200 teenagers. Nearly all of them admitted to picking their noses, on average four times per day. That's not all that enlightening; we knew this. But what are interesting are the patterns. Only 7.6% of students reported sticking their fingers into their noses more than 20 times each day, but nearly 20% thought they had a “serious nose-picking problem”. Most of them said they did it to relieve an itch or to clear out nasal debris, but 24 of them, i.e. 12%, admitted that they picked their nose because it felt good.

Ann Coulter penned a column explaining why soccer is un-American. First, it’s collectivist. (“Individual achievement is not a big factor…blame is dispersed.”) Second, it’s effeminate. (“It’s a sport in which athletic talent finds so little expression that girls can play with boys.”) Third, it’s culturally elitist. (“The same people trying to push soccer on Americans are the ones demanding that we love HBO’s “Girls,” light-rail, Beyoncé and Hillary Clinton.”) Fourth, and most importantly, “It’s foreign…Soccer is like the metric system, which liberals also adore because it’s European.”

Soccer hatred, in other words, exemplifies American exceptionalism.

For Coulter and many contemporary conservatives, by contrast, part of what makes America exceptional is its individualism, manliness and populism

Playfulness is what makes us human. Doing pointless, purposeless things, just for fun. Doing things for the sheer devilment of it. Being silly for the sake of being silly. Larking around. Taking pleasure in activities that do not advantage us and have nothing to do with our survival. These are the highest signs of intelligence. It is when a creature, having met and surmounted all the practical needs that face him, decides to dance that we know we are in the presence of a human. It is when a creature, having successfully performed all necessary functions, starts to play the fool, just for the hell of it, that we know he is not a robot.

All at once, it was clear. The bush people, lounging about after dark in their family shelter, perhaps around a fire – basically just hanging out – had been amusing themselves doing a bit of rock art. And perhaps with some leftover red paste, a few of the younger ones had had a competition to see who could jump highest and make their fingermarks highest up the overhang. This was not even art. It called for no particular skill. It was just mucking about. And yet, for all the careful beauty of their pictures, for all the recognition of their lives from the vantage point of my life that was sparked in me by the appreciation of their artwork, it was not what was skilful that brought me closest to them. It was what was playful. It was their jumping and daubing finger-blobs competition that brought them to me, suddenly, as fellow humans across all those thousands of years. It tingled my spine.

An age is coming when machines will be able to do everything. “Ah,” you say, “but they will not be conscious.” But how will we know a machine is not conscious – how do we know another human being is conscious? There is only one way. When it starts to play. In playfulness lies the highest expression of the human spirit.