Evolution News and Research

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Discovery of new mechanism for cell division

A Swedish research group, partly financed by NWO, has discovered a new mechanism for cell division in a microorganism found in extremely hot and acidic conditions.

25 Nov 2008

Big sperm not necessarily fastest

Contrary to common scientific belief, the length of a sperm's tail does not always determine how fast it can swim.

24 Nov 2008

Discovery of new species of bacterium that causes leprosy

A new species of bacterium that causes leprosy has been identified through intensive genetic analysis of a pair of lethal infections, a research team reports in the December issue of the American Journal of Clinical Pathology.

24 Nov 2008

Prion switching in response to environmental stress

If you have had a hard day at work, you may change your eating habits, perhaps favoring comfort food, but you don't suddenly develop the ability to eat the plate and cutlery.

24 Nov 2008

Sexual reproduction and evolution

The utility of sex, according to an intriguing new theory of evolutionary biology, may be its ability to promote genes that play well with many other partners rather than those that shine with just one specific set of genes.

24 Nov 2008

New approach to stopping germs

Keeping germs from cooperating can delay the evolution of drug resistance more effectively than killing germs one by one with traditional drugs such as antibiotics, according to new research from The University of Arizona in Tucson.

20 Nov 2008

Common cold virus originated in birds

A virus that causes cold-like symptoms in humans originated in birds and may have crossed the species barrier around 200 years ago, according to an article published in the December issue of the Journal of General Virology.

20 Nov 2008

What are 'orphan' genes needed for?

Closely related animal species share most of their genes and look almost identical.

18 Nov 2008

Time, surgery appear to reduce episodes of dizziness in patients with Ménière's

Episodes of dizziness tend to become less frequent over time in patients with Ménière's disease, a condition characterized by vertigo, hearing loss and ringing in the ears, according to a report in the November issue of Archives of Otolaryngology–Head & Neck Surgery.

17 Nov 2008

New molecular insight into vertebrate brain development

In the December 1st issue of G&D, Dr. Fred H. Gage (The Salk Institute for Biological Studies) and colleagues reveal a role for the Hippo signaling pathway in the regulation of vertebrate neural development, identifying new factors - and potential therapeutic targets - that may be involved in congenital brain size disorders and neurological tumor formation.

17 Nov 2008

Researchers identify regions of female brain that respond more strongly to masculine faces

Scientists have long known that women's preferences for masculine men change throughout their menstrual cycles.

12 Nov 2008

Promising clinical trial for patients with obsessive-compulsive disorder

Obsessive-compulsive disorder (OCD) affects 2% of the population and is considered a psychiatric disorder. It is the number four psychiatric pathology in terms of frequency following phobias, disorders relating to alcohol and drugs, and depression.

12 Nov 2008

Without enzyme, biological reaction essential to life takes 2.3 billion years

All biological reactions within human cells depend on enzymes. Their power as catalysts enables biological reactions to occur usually in milliseconds. But how slowly would these reactions proceed spontaneously, in the absence of enzymes - minutes, hours, days? And why even pose the question?

12 Nov 2008

Neck arteries of obese children and teens look more like those of 45-year-olds

Researchers used ultrasound to measure the thickness of the inner walls of the neck (carotid) arteries that supply blood to the brain. Increasing carotid artery intima-media thickness (CIMT) indicates the fatty buildup of plaque within arteries feeding the heart muscle and the brain, which can lead to heart attack or stroke.

11 Nov 2008