A new Rice University study's side-by-side comparison of 10 human genetic models to determine when 'mitochondrial Eve'(mtEve), the maternal ancestor of all living humans, lived uses a very different set of assumptions about the way humans migrated, expanded and spread across Earth - and it won't be without some controversy.
Mitochondrial Eve studies are an example of how scientists probe the genetic past to learn more about mutation, selection and other genetic processes that play key roles in disease but deterministic models may not be enough, says the new study. Statisticians to the rescue.
Children are natural psychologists and by the time they reach preschool they understand that other people have desires, preferences, beliefs, and emotions too.
Exactly how they learn this isn't clear but a new study says that one way children figure out another's preferences is by using a topic you'd think they won't formally encounter until college: statistics.
In one experiment, children aged 3 and 4 saw a puppet named "Squirrel" remove five toys of the same type from a container full of toys and happily play with them. Across the children, the toys that Squirrel removed were the same (for example, all five were blue flowers).
What varied, however, were the contents of the container.
Researchers at the Buck Institute for Age Research writing in the journal Stem Cells say they have successfully used human induced pluripotent stem cells (iPSCs) to treat rodents afflicted with Parkinson's Disease (PD).
They say the research validates a scalable protocol that the same group had previously developed and can be used to manufacture the type of neurons needed to treat the disease and paves the way for the use of iPSC's in various biomedical applications.
iPSC research has come strongly into play during the last few years because of limitations on human embryonic stem cell research in the Bush and Obama administrations and are a hot topic among scientists focused on regenerative medicine.
Research presented at the annual meeting of the American Sociological Association had a surprising finding for women and careers - women who are economically dependent on a man are less likely to cheat but in men it is just the opposite. So strippers beware. Your boyfriend who is 'getting his band going' may not be faithful for long.
Alec Baldwin never actually left the United States, even though he said he would if George W. Bush won in 2004. So people make silly threats about politics but do political outcomes have any effect on more serious issues, like suicide?
Suicide risk factors are something sociologists love to think about and a new longitudinal study published in Social Science Quarterly says it analyzed suicide rates at a state level from 1981-2005 and determined that presidential election outcomes directly influence suicide rates among voters.
Belief: Girls tend to hang out in smaller, more intimate groups than boys.
Not really. At least not by the time children reach the eighth grade, says a new Journal of Social and Personal Relationships article.
Jennifer Watling Neal, assistant professor of psychology at Michigan State University, says her study is one of the first to look at how girls' and boys' peer networks develop across grades. Because children's peer-group structure can promote or mitigate negative behaviors like bullying and positive behaviors like helping others, Neal said it's important for researchers to have a better picture of what these groups look like.