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Find out how and why the Earth's climate is changing

Last October we introduced a new feature in which, each Monday morning this school year, we posted a New York Times photograph without a caption, then invited students to answer three deceptively simple questions about it: What’s going on in this picture? What do you see that makes you say that? What more can you find? As student answers poured in to the blog each week — this shows someone learning a back-flip; I think he’s in the military because of his camouflage shirt; The background makes it look like a movie set — our collaborators for the feature, Visual Thinking Strategies, acted as live moderators, linking thoughts and posting further questions intended to help them go deeper and see more. Most weeks that created a lively debate in our comments section, as students of all ages, backgrounds and places pushed each other to find detail and defend interpretations.

How large is Africa compared to the United States, or Western Europe? Most inhabitants of the latter places might guess it is a little larger, but few would have any idea of the scale of the difference. This has led German graphics designer Kai Krause to produce this map to shake people's perceptions a little.

Any attempt to map a spherical planet onto a flat map will involve distortions of size, shape or both. There is a passionate debate among cartographers about the best way to hang the world on a wall, but most agree that the most common maps we get our sense of the world from are very bad ways to do it. The problem is that these maps exaggerate the size of the countries at high  latitudes, and shrink places near the equator - leading to a perception that Europe is larger than South America, to pick just one example among many.

Africa, which spans the equator, fares particularly badly on these sorts of projections: Krause says, "Africa is so mind-numbingly immense, that it exceeds the common assumptions by just about anyone I ever met: it contains the entirety of the USA, all of China, India, as well as Japan and pretty much all of Europe as well - all combined!”  Some have argued that since people associate size with importance this encourages the already strong tendency of the world's wealthiest nations to disregard those who live in the tropics. 

Very few economists foresaw the great recession of 2008–2009. Why not? Economists have long assumed that human beings are “rational,” but behavioral findings about human fallibility have put a lot of pressure on that assumption. People tend to be overconfident; they display unrealistic optimism; they often deal poorly with risks; they neglect the long term (“present bias”); and they dislike losses a lot more than they like equivalent gains (“loss aversion”). And until recent years, most economists have not had much to say about the problem of inequality, which seems to be getting worse.

By emphasizing human fallibility, the group of scholars known as behavioral economists has raised a lot of doubts about this view. Their catalog of errors on the part of consumers and investors can be taken to identify a series of “behavioral market failures,” each of them calling for some kind of government response (such as information campaigns to promote healthy eating or graphic warnings to discourage smoking). But George Akerlof and Robert Shiller want to go far beyond behavioral economics, at least in its current form. They offer a much more general, and quite damning, account of why free markets and competition cause serious problems.

The English “please” is short for “if you please,” “if it pleases you to do this” — it is the same in most European languages (French si il vous plait, Spanish por favor). Its literal meaning is “you are under no obligation to do this.” “Hand me the salt. Not that I am saying that you have to!” This is not true; there is a social obligation, and it would be almost impossible not to comply. But etiquette largely consists of the exchange of polite fictions (to use less polite language, lies). When you ask someone to pass the salt, you are also giving them an order; by attaching the word “please,” you are saying that it is not an order. But, in fact, it is.

In English, “thank you” derives from “think,” it originally meant, “I will remember what you did for me” — which is usually not true either — but in other languages (the Portuguese obrigado is a good example) the standard term follows the form of the English “much obliged” — it actually does means “I am in your debt.” The French merci is even more graphic: it derives from “mercy,” as in begging for mercy; by saying it you are symbolically placing yourself in your benefactor”s power — since a debtor is, after all, a criminal.

Gerd Gigerenzer's test In 2006 and 2007 Gigerenzer gave a series of statistics workshops to gynaecologists, and kicked off every session with the same question: A 50-year-old woman, no symptoms, participates in routine mammography screening. She tests positive, is alarmed, and wants to know from you whether she has breast cancer for certain or what the chances are. Apart from the screening results, you know nothing else about this woman. How many women who test positive actually have breast cancer? What is the best answer? nine in 10 eight in 10 one in 10 one in 100 Gigerenzer then supplied the doctors with data about Western women of this age. (His figures were based on US studies from the 1990s, rounded up or down for simplicity - recent stats from Britain's National Health Service are slightly different.) The probability that a woman has breast cancer is 1% ("prevalence") If a woman has breast cancer, the probability that she tests positive is 90% ("sensitivity") If a woman does not have breast cancer, the probability that she nevertheless tests positive is 9% ("false alarm rate") In one session, almost half the gynaecologists said the woman's chance of having cancer was nine in 10. Only 21% said that the figure was one in 10 - which is the correct answer.

tanding at the turn of the millennium, how odd it seems that women, the majority of the human species, have not, over the course of so many centuries, intervened successfully once and for all on their own behalf. That is, until you consider that women have been trained to see themselves as having no relationship to history, and no claim upon it. Feminism can be defined as women's ability to think about their subjugated role in history, and then to do something about it. The 21st century will see the End of Inequality -- but only if women absorb the habit of historical self-awareness, becoming a mass of people who, rather than do it all, decide at last to change it all. The future is ours to lose.

women” in 2013, Park Yu-ha wrote that she felt “a bit fearful” of how it might be received. After all, she said, it challenged “the common knowledge” about the wartime sex slaves.But even she was not prepared for the severity of the backlash.In February, a South Korean court ordered Ms. Park’s book, “Comfort Women of the Empire,” redacted in 34 sections where it found her guilty of defaming former comfort women with false facts. Ms. Park is also on trial on the criminal charge of defaming the aging women, widely accepted here as an inviolable symbol of Korea’s suffering under colonial rule by Japan and its need for historical justice, and she is being sued for defamation by some of the women themselves.

The United Nations has rekindled the debate about sexualized images of children in Japanese manga art after its Special Envoy on Child Protection, Maud de Boer-Buquicchio, called for the east Asian country to ban certain graphic content in anime.