Researchers have been able to experimentally reproduce morphological changes in mice which have taken millions of years to occur. Through small and gradual modifications in the embryonic development of mice teeth, induced in the laboratory, they obtained teeth which morphologically are very similar to those observed in the fossil registry of rodent species which separated from mice millions of years ago.

To modify the development of their teeth, the team from the University of Helsinki and the Universitat Autònoma de Barcelona worked with embryonic teeth cultures from mice not coded by the ectodysplasin A (EDA) protein, which regulates the formation of structures and differentiation of organs in the embryo throughout its development.

Scholars at University Hospitals Rainbow Babies  &  Children's Hospital analyzed pediatric medical emergencies on flights worldwide between January 2010 - June 2013 and found 90 that percent of deaths occurred in children under the age of 2 - lap infants may be at greater risk for death on a commercial airline flight, they suggest.

The history of World War I - since there was no II then, it was simply The Great War - is well-known. Volumes have been written about why European monarchs, related to each other, nonetheless rolled "the iron dice" and sent millions of young men to their deaths. The technological and medical advances, and America's emergence as the decision-maker in geopolitics, have also been exhaustively examined.

Yet the role of women, not so much. World War II was another matter; from Rosie the Riveter to WACs, empowered female imagery was common. World War I, on the other hand, caused  progress on universal suffrage to go backward, and the role of women challenged the concept of femininity that existed.  

Topological transport of light is the photonic analog of topological electron flow in certain semiconductors.

In the electron case, the current flows around the edge of the material but not through the bulk. It is "topological" in that even if electrons encounter impurities in the material the electrons will continue to flow without losing energy.

Modern humans began the first steps to what we might call culture some 50,000 years ago, 150,000 years after appearing in the fossil record. What changed?

A new paper in Current Anthropology argues that more feminine faces and gentler personalities were the result of less testosterone. People got nicer. The evidence is in the shape of more than 1,400 ancient and modern skulls and the conclusion is that human society advanced when people started being nicer to each other, which entails having a little less testosterone in action. 

Heavy brows were so 100,000 B.C., rounder heads were in, and those changes could be linked to testosterone levels acting on the skeleton, according to Duke University anthropologist Steven Churchill.

If you read politics on Twitter, you would have recently seen that Republicans in the U.S. Congress are going to impeach President Obama if they get enough seats in November, so it is vital that Democrats win elections. 

Women who recently used birth control pills containing high-dose estrogen and a few other formulations had an increased risk for breast cancer compared to women using some other formulations did not, according to new data published in Cancer Research.

Security researchers at the Georgia Tech Information Security Center (GTISC) have discovered a way to jailbreak current generation Apple iOS devices (e.g., iPhones and iPads) running the latest iOS software. The jailbreak, which enables circumvention of Apple's closed platform, was discovered by analyzing previously patched vulnerabilities with incomplete fixes.

It shows that quick workarounds mitigating only a subset of a multi-step attack leave these devices vulnerable to exploitation. Patching all vulnerabilities for a modern, complex software system (i.e., Windows and iOS) is often difficult due to the volume of bugs and response-time requirements.

One of the most diverse families in the ocean today, marine bivalve mollusks - called Lucinidae or lucinids - originated more than 400 million years ago in the Silurian period, with adaptations and life habits like those of its modern members. 

About 500 lucinid species exist today, with by far the highest diversity in shallow-sea seagrass meadows. They did it all with a little help from symbiotic friends.

At its origin, the Lucinidae family remained at very low diversity until the rise of mangroves and seagrasses near the end of the Cretaceous. Mangroves and seagrasses created protective habitats in which the bivalve mollusks could thrive, in turn providing benefit through a sort of tri-level symbiosis. 

An algorithm works for diagnosing pediatric patients with suspected appendicitis and that reduces the utilization of computed tomography (CT) scans, without affecting diagnostic accuracy.

Acute appendicitis is the most common cause of acute abdominal pain in children. Appendicitis occurs when the appendix becomes inflamed and filled with pus. CT scans are often used to diagnose acute appendicitis because they are accurate, widely available and have the ability to provide clinicians with advanced information in appendicitis cases suspected of complications.