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Provocative artist Banksy has revealed a 20m high artwork in New York to draw attention to the imprisonment of Zehra Dogan, a Kurdish painter from Turkey.His image of her behind bars depicts the last bar as a pencil, and next to the mural is a call for her release. Dogan was jailed for two years and nine months last year in Turkey, for her painting of the Kurdish town Nusaybin. Her picture, copied from a newspaper photograph, showed the town reduced to rubble during conflict.

Artist Ai Weiwei is setting up "Lego collection points" in different cities after being inundated with offers of donations from supporters. Ai has accused Lego of "censorship and discrimination" after it refused his bulk order for bricks for a new exhibition in Melbourne, Australia.Lego said it has never sold directly to anyone wanting to use its product to make a political statement.The artist will now use the donated toy bricks to make a "new work".

In that pantheon of illuminatingly broken men and women, Henry stands apart. It is difficult to exaggerate the impact he has had on our understanding of ourselves. Before Brenda Milner collaborated on that first paper about Henry, the prevailing theory of memory held that its functions could not be localized to a single cortical area, that learning was distributed across the brain as a whole. By that theory — built upon the experimental lesioning of the brains of rats — a person’s memory would be affected only in proportion to the amount of brain tissue removed, regardless of which brain structures the tissue was removed from. Milner’s first paper about Henry, along with her previous work, upended this view.

Occasionally, I come across the term “designer baby,” and I am reminded that some parents now have the option to screen or modify the genes of their unborn children to ensure or avoid certain traits. It always gives me a feeling of unease. Obviously, I did not take this route — partly because, at least with my son, I never had to actually make the decision. My third child, Eliza, was a late midlife accident. I chose to have her despite the possibility she would have XLH, but would I have made the same decision in a planned pregnancy or if given a choice much earlier in the process? I can’t help suspecting that because of advances in genetic mapping, genetic testing, the sheer range of prenatal choices, chances are that in a generation or two, there will be no one in the world who has XLH, no one who looks like me or my children — at least not in the so-called developed world — and I don’t know how to feel about that.

When two Syrian immigrant brothers refused to shake their female teacher’s hand this year, it ignited national outrage in Switzerland.This week, the authorities in the northern canton of Basel-Landschaft ruled that the students, who studied at a public school in the small town of Therwil, could not refuse to shake their teacher’s hand on religious grounds. They said that parents whose children refused to obey the longstanding tradition could be fined up to 5,000 Swiss francs, about $5,050.Shaking a teacher’s hand before and after class is part of Switzerland’s social fabric, and is considered an important sign of politeness and respect.

The period — the full-stop signal we all learn as children, whose use stretches back at least to the Middle Ages — is gradually being felled in the barrage of instant messaging that has become synonymous with the digital age

Building an archive has always required asking a couple of simple but thorny questions: What will we save and how? Whose stories are the most important and why? In theory, the internet already functions as a kind of archive: Any document, video or photo can in principle remain there indefinitely, available to be viewed by anyone with a connection. But in reality, things disappear constantly.

But there’s still a low-grade urgency to save our social media for posterity — and it’s particularly urgent in cases in which social media itself had a profound influence on historic events.

Social media might one day offer a dazzling, and even overwhelming, array of source material for historians. Such an abundance presents a logistical challenge (the total number of tweets ever written is nearing half a trillion) as well as an ethical one (will people get to opt out of having ephemeral thoughts entered into the historical record?). But this plethora of new media and materials may function as a totally new type of archive: a multidimensional ledger of events that academics, scholars, researchers and the general public can parse to generate a more prismatic recollection of history.

The stand-off in Ukraine has revived memories of the Cold War, but for many under the age of 40 the events of that conflict now seem far off. The US, UK and France were allied with the communist Soviet Union during World War Two, but as it became clear victory in the war was approaching new battle lines started to be drawn. What followed was 45 years of tension, marked by espionage and proxy wars involving client states, all undertaken with the knowledge of the nuclear catastrophe that actual war would bring. People who experienced the key events of the conflict describe how it affected them - and Cold War expert Scott Lucas, of Birmingham University and EA WorldView, explains how they fitted into the bigger picture.

The mechanism by which a good night's sleep improves learning and memory has been discovered by scientists. The team in China and the US used advanced microscopy to witness new connections between brain cells - synapses - forming during sleep. Their study, published in the journal Science, showed even intense training could not make up for lost sleep. Experts said it was an elegant and significant study, which uncovered the mechanisms of memory. It is well known that sleep plays an important role in memory and learning. But what actually happens inside the brain has been a source of considerable debate.

But now experts say a reliance on sat-navs and smartphone map apps is undermining map-reading skills. So here are five reasons why you should love maps and resist the easy attraction of the sat-nav.

he poem “Shirt,” by Robert Pinsky, first appeared in the pages of The New Yorker in 1989. In it, the speaker merges descriptions of garment manufacturing with the social and personal histories of the workers who create the items he buys and wears.

ostering innovation and helping people to think analytically,

Called simply Bronze, it celebrates a metal so important it has its own age of history attached to it, and so responsive to the artist's skill that it breathes life into gods, humans, mythological creatures and animals with equal success.

It is remarkable to think that had Bronze been mounted say 15 years ago, the portrait of the past that it delivered would have been subtly different. History is very far from a done deal.

Is capital punishment moral? Is it necessary?

Who decides what constitutes “proof”? Can “proof” come only from experiments? If so, we’re in trouble, because we can never do an experiment in humans for any exposure that is suspected to be harmful.

The problem is that as new data come along, what was once proven can become unproven again by new expert panels who now consider this new evidence and come to a different conclusion. This leads to the perhaps uncomfortable definition of “proof” as “a consensus of experts.”

The point of emphasis is that there is no hard formula on how to consider the evidence; it is a group decision by a panel of experts (the scientific jury) in which sometimes the epidemiological evidence is so strong that it doesn’t matter whether mice get cancer or not. And sometimes the epidemiology is insufficient to render a verdict on causation and so the toxicology becomes important in making the decision.