A new, complete 'tree of life' tracing the history of all 4,500 mammals on Earth shows that they did not diversify as a result of the death of the dinosaurs, says new research published in Nature today.

The study was undertaken in the UK by scientists at Imperial College London and the Zoological Society of London (ZSL). It contradicts the previously accepted theory that the Mass Extinction Event (MEE) that wiped out the dinosaurs 65 million years ago prompted the rapid rise of the mammals we see on the earth today.

Common sense says businesses, driven by profits, will go where they can make the most by paying the least.

Three researchers, Dr Holger Görg from GEP (the Globalisation and Economic Policy Centre, University of Nottingham ) and Professor Hassan Molana and Dr Catia Montagna from the University of Dundee, disagree.

After analyzing data from 18 countries over a 14 year period, the team found that the countries which attracted the highest levels of foreign investment were the ones with higher taxes and higher public social expenditure as a proportion of GDP.

Dr Görg, Associate Professor and Reader in Economics at GEP, said:

"The results may be startling and appear to be counterintuitive.

"Most economists have always argued that globalisation leads to a ‘race-to-th

Tailor-made dietary fiber may be able to flush artery-clogging cholesterol from the body and lower the risk of heart disease, according to a new study by University of Guelph researchers.

The study found that a fiber-rich plant extract from a legume grown in India can reduce cholesterol in pigs. The results were published in the March issue of the Journal of Nutrition.

If you’re a palaeontologist you’ve heard this question a thousand times. And if you’re not a palaeontologist you might wonder why you never get the same answer twice. Well you see the annoying part of palaeontology is that the most spectacular animals are sometimes only known from a single bone or sometimes a fragment of a bone and so ‘reconstructing’ that animal can be incredibly difficult (and controversial).

From Mary, in response to my request for more information about the scientists who gave us the YORP effect:

An interdisciplinary team of researchers at Vanderbilt University has analyzed the simplest known biological clock and figured out what makes it tick. The results of their analysis are published in the March 27 issue of the journal Public Library of Science Biology.

Biological clocks are microscopic pacemakers. They are found in everything from pond scum to human beings and appear to help organize a dizzying array of biochemical processes. A traveler experiences jet lag when his or her internal clock becomes out of synch with the environment. Seasonal Affective Disorder, some types of depression, sleep disorders and problems adjusting to changes in work cycles all can occur when an individual's biological clock acts up.

Using measurements of the four ESA's Cluster satellites, a study published this week in Nature Physics shows pioneering experimental evidence of magnetic reconnection also in turbulent 'plasma' around Earth.

Given the huge shortage of donor organs, researchers have been trying to find ways to transplant animal organs across different species (known as "xenotransplantation"), with the eventual aim of transplanting animal organs into humans. The major stumbling block, says Dr Muhammad Mohiuddin (US National Heart, Lung, and Blood Institute) in a paper in PLoS Medicine, is that the immune system in the animal receiving the organ tends to reject the transplant.

Nevertheless, the recent development of genetically modified pigs that are more compatible with humans, "has reinstated hope for the success of xenotransplantation," he says.

Biology and chemistry researchers from Virginia Tech are creating molecular complexes to bind to and disrupt the DNA of diseased tissues, such as tumors or viruses. Testing the activity of each of the therapeutic molecule designs has been a time-consuming process. But a student’s invention now provides rapid screening to accelerate discovery of promising new drugs.

Aaron J. (A.J.) Prussin II of Blacksburg, Va., a second year student at Virginia Tech who is majoring in biochemistry and biology, with a minor in chemistry, has created an LED system that glows a beautiful shade of blue when the special molecules successfully bind to DNA.

For the first time, researchers have used adult bone marrow stem cells to regenerate healthy human liver tissue, according to a study published in the April issue of the journal Radiology.

When large, fast-growing cancers invade the liver, some patients are unable to undergo surgery, because removing the cancerous tissue would leave too little liver to support the body.