String theory
String theory was first studied in the late 1960s[3] as a theory of the strong nuclear force before being abandoned in favor of the theory of quantum chromodynamics. Subsequently, it was realized that the very properties that made string theory unsuitable as a theory of nuclear physics made it a promising candidate for a quantum theory of gravity. Five consistent versions of string theory were developed until it was realized in the mid-1990s that they were different limits of a conjectured single 11-dimensional theory now known as M-theory.[4] Many theoretical physicists, including Stephen Hawking, Edward Witten and Juan Maldacena, believe that string theory is a step towards the correct fundamental description of nature: it accommodates a consistent combination of quantum field theory and general relativity, agrees with insights in quantum gravity (such as the holographic principle and black hole thermodynamics) and has passed many non-trivial checks of its internal consistency.
An On/Off Switch for Sex and Violence
RECENTLY DEVELOPED powerful, yet also delicate and refined, genetic tools can invasively probe nervous systems of animals, far surpassing the safer but much cruder techniques that psychologists and cognitive neuroscientists use to observe the human brain. Now in a remarkable series of experiments, researchers have located a trigger for aggression in mice—providing us with fresh insights into the workings of our human consciousness. You might object that mice and men are not the same and that studying the murine mind is different from studying the human mind. This fact is obviously true.
Mutated DNA Causes No-Fingerprint Disease
Almost every person is born with fingerprints, and everyone's are unique. But people with a rare disease known as adermatoglyphia do not have fingerprints from birth. Affecting only four known extended families worldwide, the condition is also called immigration-delay disease, since a lack of fingerprints makes it difficult for people to cross international borders.
1. Introduction to Human Behavioral Biology Video
Log in Get Smart Cynthia Yildirim 1.
M-tree
Overview[edit] 2D M-Tree visualized using ELKI. The tree has a single level of leaf nodes.
The Unselfish Gene
The Idea in Brief Executives, like most other people, have long believed that human beings are interested only in advancing their material interests. However, recent research in evolutionary biology, psychology, sociology, political science, and experimental economics suggests that people behave far less selfishly than most assume. Evolutionary biologists and psychologists have even found neural and, possibly, genetic evidence of a human predisposition to cooperate. These findings suggest that instead of using controls or carrots and sticks to motivate people, companies should use systems that rely on engagement and a sense of common purpose.
Visible Proofs: Forensic Views of the Body: Galleries: Media: Autopsy
WARNING: Some people may find images from actual postmortem dissections disturbing. Viewer discretion advised. Videos on this page require either QuickTime Player or Windows Media Player.
Cell Cycle & Cytokinesis - BioChemWeb.org
Cell Cycle Regulation and the Control of Cell Proliferation (Cell Growth + Cell Division) Cell Cycle Research - General resource with links to relevant recent literature, news and job listings. (Ion Channel Media Group) Cell Division - Undergraduate-level lectures on cell division.
Frans de Waal on Political Apes, Science Communication, and Building a Cooperative Society
Portrait of de Waal by Nathaniel Gold “It’s the animal in us,” we often hear when we’ve been bad. But why not when we’re good? This is the question that has driven Frans de Waal for the past 30 years. From his pioneering research on alliance formation in Chimpanzee Politics , to reconciliation behavior in Peacemaking Among Primates and Good Natured , to the implications for human life and thought in Primates and Philosophers, de Waal has been seeking to understand the roots of moral behavior in the most political of animals. The theme of his newest book, The Age of Empathy: Nature’s Lessons for a Kinder Society , is the culmination of his work to date and presents a synthesis of the factors that account for cooperative behavior in the natural world.
49 Fascinating YouTube Videos to Learn About the Human Body
As any doctor, nurse practitioner or other health care professional knows, the body is an interesting system. In many ways, it’s like a machine, with many complex parts. There is a lot to learn about the body and how it works, as well as how its different systems interact to create a larger system.
We stand on the shoulders of cultural giants
In reading The cultural niche: Why social learning is essential for human adaptation in PNAS I couldn’t help but think back to a conversation I had with a few old friends in Evanston in 2003. They were graduate students in mathematics at Northwestern, and at one point one of them expressed some serious frustration at the fact that so many of the science and business students in his introductory calculus courses simply wanted to “learn” a disparate set of techniques, rather than understand calculus. The reality of course is that the vast majority of people who ever encounter calculus aim to learn it for reasons of utility, not so that they can grok the fundamental theorem of calculus. With the proliferation of tools such as Mathematica and powerful portable calculators fewer and fewer people are getting their hands dirty with calculus in an analytic sense, and more often see it as simply a “requirement” which they have to pass. In a The cultural niche Robert Boyd, Peter J.
Blood Vessels: Capillaries
Unlike the arteries and veins, capillaries are very thin and fragile. The capillaries are actually only one epithelial cell thick. They are so thin that blood cells can only pass through them in single file. The exchange of oxygen and carbon dioxide takes place through the thin capillary wall. The red blood cells inside the capillary release their oxygen which passes through the wall and into the surrounding tissue.
Yes, I know, it sounds crazy! Furthermore, it's difficult to think that they are workin on projects such as building new kind of DNA and to know that they only know about 4% of the fonction of the DNA. They are still stating that some sequences of the DNA is useless (just because they don't know more about it...). Please, mother nature, forgive them because they don't shit about what they do but kick their asses to help them understand that life is all about respecting things as they are. by ekolibrium Apr 24
APG I'm actually pretty skeptical of this article, it claims MIT found a way to edit DNA sequences and that they can basically use that to create organisms to their own will, like they could make DNA that codes for proteins not found in nature or create super bacteria to help us fight viruses. It all seems too sci-fi to me. by sc215 Apr 23