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"Yet for all these apparent flaws, the basic building blocks of human eyesight turn out to be practically perfect. Scientists have learned that the fundamental units of vision, the photoreceptor cells that carpet the retinal tissue of the eye and respond to light, are not just good or great or phabulous at their job. They are not merely exceptionally impressive by the standards of biology, with whatever slop and wiggle room the animate category implies. Photoreceptors operate at the outermost boundary allowed by the laws of physics, which means they are as good as they can be, period. Each one is designed to detect and respond to single photons of light - the smallest possible packages in which light comes wrapped. "

"A long-standing idea that human languages share universal features that are dictated by human brain structure has been cast into doubt. A study reported in Nature has borrowed methods from evolutionary biology to trace the development of grammar in several language families. The results suggest that features shared across language families evolved independently in each lineage. The authors say cultural evolution, not the brain, drives language development. At the heart of both studies is a method based on what are known as phylogenetic studies."

"Debunking the social stigma around late risers, or what Einstein has to do with teens' risk for smoking. "Six hours' sleep for a man, seven for a woman, and eight for a fool," Napoleon famously prescribed. (He would have scoffed at Einstein, then, who was known to require ten hours of sleep for optimal performance.) This perceived superiority of those who can get by on less sleep isn't just something Napoleon shared with dictators like Hitler and Stalin, it's an enduring attitude woven into our social norms and expectations, from proverbs about early birds to the basic scheduling structure of education and the workplace. But in Internal Time: Chronotypes, Social Jet Lag, and Why You're So Tired, a fine addition to these 7 essential books on time, German chronobiologist Till Roenneberg demonstrates through a wealth of research that our sleep patterns have little to do with laziness and other such scorned character flaws, and everything to do with biology. In fact, each of us possesses a different chronotype - an internal timing type best defined by your midpoint of sleep, or midsleep, which you can calculate by dividing your average sleep duration by two and adding the resulting number to your average bedtime on free days, meaning days when your sleep and waking times are not dictated by the demands of your work or school schedule. For instance, if you go to bed at 11 P.M. and wake up at 7 A.M., add four hours to 11pm and you get 3 A.M. as your midsleep."

"Is language first and foremost an artifact of culture? Or is it largely determined by human biology? This issue has been argued back and forth for a couple of centuries with no clear resolution in sight. Guy Deutscher's 2005 book "The Unfolding of Language" placed him firmly in the pro-culture camp. Now, in his new book, "Through the Language Glass," he examines some idiosyncratic aspects of particular languages that, in his opinion, cast further doubt on biologically based theories of language. "

"In recent years popular science writing has bombarded us with titillating reports of discoveries of the brain's psychological prowess. Such reports invade even introductory patter in biology and psychology. We are told that the brain - or some area of it sees, decides, reasons, knows, emotes, is altruistic/egotistical, or wants to make love. For example, a recent article reports a researcher's "looking at love, quite literally, with the aid of an MRI machine." One wonders whether lovemaking is to occur between two brains, or between a brain and a human being. There are three things wrong with this talk."

"Harvard evolutionary psychologist, Marc D. Hauser, argues that to understand what animals think and what they feel, we must ask about the kinds of selection pressures which shaped their minds and see the creature for what it is, no more, no less. Using the tools of evolutionary biology, linguistics, neuroscience, and cognitive science, he asks questions such as Why can't animals be taught to speak? How do animals find their way home in the dark? Do animals lie or feel guilty? Do they enjoy sex? Why were emotions designed into animal systems? Why are certain emotions universal and others highly specialized? "

Biologist Stewart Firestein and world-renowned perfumer Christophe Laudamiel team up to tackle the science of smell.

"By Monday, Four Loko, the alcohol-and-caffeine-laced energy drink, is scheduled to be removed from store shelves nationwide, following a ruling last month by the Food and Drug Administration that the safety of such beverages is unproven and that they should no longer be manufactured or sold. During the resulting media coverage, surprisingly little attention was focused on a corollary topic. What about nonalcoholic energy drinks, which will remain on sale? Are they safe? Effective? Who should be drinking them? Who shouldn't? With excellent timing, a number of new scientific studies and reviews have just been published that address those and related questions about energy drinks, particularly for athletes. Their findings and conclusions are thought-provoking."

"Every day, hundreds of thousands of scholars study human behavior. Every day, a few of their studies are bundled and distributed via e-mail by Kevin Lewis, who covers the social sciences for The Boston Globe and National Affairs. And every day, I file away these studies because I find them bizarrely interesting. "