Redundancy of English language is a Goldilocks zone for C...

In Shannon’s terms, the feature of messages that makes codecracking possible is redundancy. A historian of cryptography, David Kahn, explained it like this: “Roughly, redundancy means that more symbols are transmitted in a message than are actually needed to bear the information.” Information resolves our uncertainty; redundancy is every part of a message that tells us nothing new. Whenever we can guess what comes next, we’re in the presence of redundancy. Letters can be redundant: be...

 The Great Lifespan Escape

At the time when the lines begin, in the mid-18th century, life expectancy in Europe and the Americas was around 35, where it had been parked for the 225 previous years for which we have data.3 Life expectancy for the world as a whole was 29. These numbers are in the range of expected life spans for most of human history. The life expectancy of hunter-gatherers is around 32.5, and it probably decreased among the peoples who first took up farming because of their starchy diet and the diseases ...

 1.6 Grams of Protein a Day Per Kilogram of Weight

To answer the simplest question of whether taking in more protein during weight training led to larger increases in muscle size and strength, the researchers added all of the results together. [...] But those who did ramp up their protein gained an extra 10 percent or so in strength and about 25 percent in muscle mass compared to the control groups. The researchers also looked for the sweet spot for protein intake, which turned out to be about 1.6 grams of protein per kilogram of body weig...

 1.8% of Gun Related Deaths in the Home Due to Self-Defense

To study the epidemiology of deaths involving firearms kept in the home, we reviewed all the gunshot deaths that occurred in King County, Washington (population 1,270,000), from 1978 through 1983. The medical examiner's case files were supplemented by police records or interviews with investigating officers or both, to obtain specific information about the circumstances, the scene of the incident, the type of firearm involved, and the relationship of the suspect to the victim. A total of 743 ...

 Small Minority Accounts for Bulk of Gun Ownership

Since the 2008 election of President Obama, the number of firearms manufactured in the U.S. has tripled, while imports have doubled. This doesn’t mean more households have guns than ever before—that percentage has stayed fairly steady for decades. Rather, more guns are being stockpiled by a small number of individuals. Three percent of the population now owns half of the country’s firearms, says a recent, definitive study from the Injury Control Research Center at Harvard University. S...

 How Literacy Impacts Reading and Gaming

For Ellie, that charade contributed to her waning interest in computer games and simulations fi-om its highpoint in middle childhood. Reasonably versed in computer technologies and a fan of emerging online forums such as Tumblr, she agreed to talk about her play in virtual worlds not as an enthusiast, but as something of a philistine. She enjoyed Second Life—but only up to a point. "The imaginative part stopped for me when I stopped designing my avatar," she told me. Further opportunities...

 Children's Attention Spans are Short, and Education Deman...

The 2016 paper, “Off-task behavior in elementary school children,” was published in the peer-reviewed journal Learning and Instruction, and was funded by the Institute of Education Sciences, an arm of the Department of Education. The researchers also kept track of how the teachers were instructing students during these observations. Not surprisingly, students went off task more frequently during whole-group instruction than during small group or individual work. Length of lesson matters...

 Underreported Atheists

The authors of the study, published earlier this year, adopted a novel way to measure atheist identity. Instead of asking about belief in God directly, they provided a list of seemingly innocuous statements and then asked: “How many of these statements are true of you?” Respondents in a control group were given a list of nine statements, such as “I own a dog” and “I am a vegetarian.” The test group received all the same statements plus one that read, “I do not believe in God.”...

 The World is Getting Better

The facts are as follows. The rate of violent crime is lower now than it was at any time between 1966 and 2009. Immigrants have a lower rate of violent crime than American citizens. Terrorists kill just three-tenths of one percent of all American homicide victims. The rate of death from terrorism in the United States was higher in the early 1970s than it is today. And since 2002, more Americans have been killed by right-wing American terrorists than by Islamic terrorists. It’s true that the...

 Mathematical Cue Words

Addition: add, plus, sum, total, altogether, increased by, grew, gained, total of, combined, more than (as in, “3 more than 7 is 10”), put together, in all Subtraction: minus, take away, diff erence, less than, from, remove, subtract, gives away, sells, loses, fewer than, decreased by, diff erence between Multiplication: product, times, doubled (tripled, etc.), some problems give information about one and ask for total amounts (also, when dealing with multiplication of fractions, of us...