The genomes of organisms from humans to corn are replete with "parasitic" strands of DNA that, when not suppressed, copy themselves and spread throughout the genome, potentially affecting health. Earlier this year Brown University researchers found that these "retrotransposable elements" were increasingly able to break free of the genome's control in cultures of human cells. Now in a new paper in the journal Aging, they show that RTEs are increasingly able to break free and copy themselves in the tissues of mice as the animals aged. In further experiments the biologists showed that this activity was readily apparent in cancerous tumors, but that it also could be reduced by restricting calories.

Americans don't like to talk about social class, we threw out the British because they believed an act of birth made them superior. In America, no class is better than any other - we are the only culture that thanks a waiter for interrupting our conversation at dinner in order to slosh water all over the table refilling a glass.

The ATLAS collaboration at the Large Hadron Collider, CERN's 8-TeV proton-proton collider now being recommissioned to run at the close-to-design energy of 13 TeV in 2015, has published a few days ago on the Cornell ArXiv the result of a search for Higgs bosons decaying to Zγ pairs.

An international team of researchers led by scientists at Virginia Tech and the University of California, Berkeley has discovered that a process that turns on photosynthesis in plants likely developed on Earth in ancient microbes 2.5 billion years ago, long before oxygen became available.

The research offers new perspective on evolutionary biology, microbiology, and the production of natural gas, and may shed light on climate change, agriculture, and human health.

Researchers have found that the melanopsin pigment in the eye is potentially more sensitive to light than its more famous counterpart, rhodopsin, the pigment that allows for night vision.

For more than two years, the staff of the Laboratory for Computational Photochemistry and Photobiology (LCPP) at Ohio's Bowling Green State University (BGSU), have been investigating melanopsin, a retina pigment capable of sensing light changes in the environment, informing the nervous system and synchronizing it with the day/night rhythm. Most of the study's complex computations were carried out on powerful supercomputer clusters at the Ohio Supercomputer Center (OSC).

One of the issues of the Atapuerca sites that generates the most scientific debate is the dating of the strata where the fossils are found. Therefore, researchers at the Spanish National Research Centre for Human Evolution, among others, strive to settle the dates. A study published by the 'Journal of Archaeological Science' has clarified that the sediment of Gran Dolina, where the first remains of Homo antecessor were discovered in 1994, is 900,000 years old.

The findings at the Lower Palaeolithic cave site of Gran Dolina, in the Sierra de Atapuerca mountain range (Burgos), have led to major advancements in our knowledge of human evolution and occupation of Eurasia.

The lipid-rich membranes of cells are largely impermeable to proteins, but evolution has provided a way through – in the form of transmembrane tunnels. A new study shows in unmatched detail what happens as proteins pass through such a pore.

A large body of literature has shown that genetically-modified plants that produce proteins from the bacterium Bacillus thuringiensis (Bt) to protect themselves from insect pests have little to no effect on a wide range of nontarget insects. However, concerns about Bt crops still exist. Now two new studies using more exacting methods show that Bt crops have no negative effects on two beneficial insect predators or on a beneficial, entomopathogenic nematode.

A new study may alleviate concerns that the human papillomavirus (HPV) vaccine leads to either the initiation of sex or unsafe sexual behaviors among teenage girls and young women.

WASHINGTON - Single-sex education does not educate girls and boys any better than coed schools, according to research published by the American Psychological Association analyzing 184 studies of more than 1.6 million students from around the world. The findings are published online Feb. 3 in the APA journal Psychological Bulletin.

"Proponents of single-sex schools argue that separating boys and girls increases students' achievement and academic interest," said author Janet Shibley Hyde, PhD, of University of Wisconsin-Madison. "Our comprehensive analysis of the data shows that these advantages are trivial and, in many cases, nonexistent."