Group items tagged

Pre Historic Puzzles: Rocking the Cradle of Civilization For more than a century, archeologists were convincing that the cradle of civilization lay in Greece, Egypt, and Mesopotamia. The learning of the advanced peoples of this region, it was thought, gradually moved west into Europe. But in the last few decades these theories have been overturned, thanks to Nobel Prize-winning physicist Willard F. Libby and a substance knows as carbon 14. Carbon 14 is a radioactive substance that exists in minute quantities. In the late 1940's Libby discovered that all plants and animals absorb it. When they die, the carbon-like all radioactive substances-begins to decay at a regular rate. Libby was able to measure this rate and could thus use carbon 14 as an archeological calendar. Today it is known that half of the carbon 14 in living organism disappears in 5,730 years, half of what remains in an additional 5,730 years, and so on. How old is old? Many of the items found at prehistoric sites are made of organic material. By measuring the amount of carbon 14 remaining in the shaft of an old ax or a piece of pottery, for example, scientists can accurately determine its age. Radiocarbon dating has proved to be phenomenally accurate: it can date to within 100 years going back to 50,000 B.C. It is particularly useful on wood because it can be checked against Dendron-chronology, dating by tree rings. A new ring forms every year in the trunk of a tree as it grows: counting the number of rings enables one to determine the age of any tree. Where did civilization begin?

"She lives in a narrow sliver of the present moment, not well connected to what just happened," Aline says. "And with her puzzles, she's able to capture what's going on in a way that she can use her creative energies. And that's one scaffolding. Another is the alphabet. Because, for example, when she's singing an alphabet song and she's at the letter 'M,' she knows where she's come from, she knows where she's going to. So it gives her a feeling of continuity, of the flow of time, which she might not otherwise be able to get."

You know that phrase, "Ignorance is bliss"? There's a reason it's stuck around all these years. Because having the upper hand in intelligence might give you an advantage in some areas, like crossword puzzle solving and quantum physics-ing, but it also might just screw up your life forever.For instance, if you're smart ...

When we've got a problem to solve, we don't just use our brains but the rest of our bodies as well, researchers at the University of Wisconsin have determined. The researchers recruited 86 American undergraduates, half of whom were prevented from moving their hands using Velcro gloves that attached to a board. The others were prevented from moving their feet, using Velcro straps attached to another board - but had their hands free. From the other side of an opaque screen, an experimenter asked questions about gears in relation to each other. For example: "If five gears are arranged in a line, and you move the first gear clockwise, what will the final gear do?" The participants solved the problems aloud and were videotaped. The videotapes were analyzed for the number of hand gestures the participants used (hand rotations or "ticking" movements, indicating counting); verbal explanations indicating the subject was visualizing those physical movements; or the use of more abstract mathematical rules, without reference to perceptual-motor processes. The researchers then repeated the experiment and analysis with 111 British adults. The researchers found that the people who were allowed to gesture usually did so, and they also commonly used perceptual-motor strategies in solving the puzzles. The people whose hands were restrained (as well as those who chose not to gesture even when allowed), used abstract, mathematical strategies much more often. Their work will be published in an upcoming issue of Psychological Science, a journal of the Association for Psychological Science.

Why are we all so different? Here is a toolkit for finding out what people are really like IN THE 4th century BC, the Greek philosopher Theophrastus, Aristotle's student and successor, wrote a book about personality. The project was motivated by his interest in what he considered a very puzzling question: "Why it has come about that, albeit the whole of Greece lies in the same clime, and all Greeks have a like upbringing, we have not the same constitution of character?" Not knowing how to get at the answer, Theophrastus decided to instead focus on categorising those seemingly mysterious differences in personality. The result was a book of descriptions of personality types to which he assigned names such as The Suspicious, The Fearful and The Proud. The book made such an impression that it was passed down through the ages, and is still available online today as The Characters of Theophrastus. The two big questions about personality that so interested Theophrastus are the same ones we ask ourselves about the people we know: why do we have different personalities? And what is the best way to describe them? In the past few decades, researchers have been gradually answering these questions, and in my new book, Making Sense of People: Decoding the mysteries of personality, I take a look at some of these answers. When it comes to the origins of personality, we have learned a lot. We now know that personality traits are greatly influenced by the interactions between the set of gene variants that we happen to have been born with and the social environment we happen to grow up in. The gene variants that a person inherits favour certain behavioural tendencies, such as assertiveness or cautiousness, while their environmental circumstances influence the forms these innate behavioural tendencies take. The ongoing dialogue between the person's genome and environment gradually establishes the enduring ways of thinking and feeling that are the building blocks of personality. This de

During World War I, peace broke out. It was Christmas 1914 on the Western Front. Despite strict orders not to chillax with the enemy, British and German soldiers left their trenches, crossed No Man's Land, and gathered to bury their dead, exchange gifts, and play games. Meanwhile: it's 2017, the West has been at peace for decades, and wow, we suck at trust. Surveys show that, over the past forty years, fewer and fewer people say they trust each other. So here's our puzzle: Why, even in peacetime, do friends become enemies? And why, even in wartime, do enemies become friends?

this is a wonderful essay: how metaphors shape the world we see.