Back then, most experts believed that differences in how girls and boys behave are mainly due to differences in how they were treated by their parents, teachers, and friends.It's hard to cling to that belief today. An avalanche of research over the past twenty years has shown that sex differences are more significant and profound than anybody guessed. Sex differences are real, biologically programmed, and important to how children are raised, disciplined, and educated. In Why Gender Matters, psychologist and family physician Dr. Leonard Sax leads parents through the mystifying world of gender differences by explaining the biologically different ways in which children think, feel, and act. He addresses a host of issues, including discipline, learning, risk taking, aggression, sex, and drugs, and shows how boys and girls react in predictable ways to different situations. For example, girls are born with more sensitive hearing than boys, and those differences increase as kids grow up. So when a grown man speaks to a girl in what he thinks is a normal voice, she may hear it as yelling. Conversely, boys who appear to be inattentive in class may just be sitting too far away to hear the teacher—especially if the teacher is female. Likewise, negative emotions are seated in an ancient structure of the brain called the amygdala. Girls develop an early connection between this area and the cerebral cortex, enabling them to talk about their feelings. In boys these links develop later. So if you ask a troubled adolescent boy to tell you what his feelings are, he often literally cannot say.Dr. Sax offers fresh approaches to disciplining children, as well as gender-specific ways to help girls and boys avoid drugs and early sexual activity. He wants parents to understand and work with hardwired differences in children, but he also encourages them to push beyond gender-based stereotypes. A leading proponent of single-sex education, Dr. Sax points out specific instances where keeping boys and girls separate in the classroom has yielded striking educational, social, and interpersonal benefits. Despite the view of many educators and experts on child-rearing that sex differences should be ignored or overcome, parents and teachers would do better to recognize, understand, and make use of the biological differences that make a girl a girl, and a boy a boy.

    They ingest 8,500 milligrams of salt a day, double the recommended amount, almost none of which comes from salt shakers. It comes from processed food, an industry that hauls in $1 trillion in annual sales. In Salt Sugar Fat, Pulitzer Prize-winning investigative reporter Michael Moss shows how this happened. Featuring examples from some of the most recognizable (and profitable) companies and brands of the last half century--including Kraft, Coca-Cola, Lunchables, Kellogg, Nestlé, Oreos, Cargill, Capri Sun, and many more--Moss’s explosive, empowering narrative is grounded in meticulous, often eye-opening research. He goes inside the labs where food scientists use cutting-edge technology to calculate the "bliss point" of sugary beverages or enhance the "mouth feel" of fat by manipulating its chemical structure. He unearths marketing techniques taken straight from tobacco company playbooks to redirect concerns about the health risks of products. He talks to concerned executives who explain that they could never produce truly healthy alternatives to their products even if serious regulation became a reality. Simply put: the industry itself would cease to exist without salt, sugar, and fat.

    In The Violinist's Thumb, he explores the wonders of the magical building block of life: DNA.There are genes to explain crazy cat ladies, why other people have no fingerprints, and why some people survive nuclear bombs. Genes illuminate everything from JFK's bronze skin (it wasn't a tan) to Einstein's genius. They prove that Neanderthals and humans bred thousands of years more recently than any of us would feel comfortable thinking. They can even allow some people, because of the exceptional flexibility of their thumbs and fingers, to become truly singular violinists. Kean's vibrant storytelling makes science entertaining, explaining human history and whimsy while showing how DNA will influence our species' future.

    The authors show how such factors as age, decade of birth, and religious adherence are reflected in patterns of sexual behavior. Some measure of the social significance of the various types of sexual behavior is provided. The authors make comparisons of female and male sexual activities, and investigate the factors which account for the similarities and differences between female and male patterns of behavior.