Scientists have shown in literally thousands of studies that the p53 gene deserves its reputation as “the guardian of the genome.” It calls to action an army of other genes in the setting of varied cell stresses, permitting repair of damaged DNA or promoting cell death when the cell damage is too great. A key net effect of p53’s action is to prevent development of cancerous cells.

Now, University of Michigan Medical School scientists provide the most thorough evidence yet that p53 also regulates a trio of genes from the realm of so-called “junk” genes — the roughly 97 percent of a cell’s genetic material whose function is only beginning to be understood.

One of the strangest and most endangered birds in the world, the kakapo, is being brought back from the brink of extinction with the help of scientists from the University of Glasgow.

The largest of all parrot species, flightless, nocturnal and plant-eating, the kakapo used to be found all over New Zealand. But ecological changes, habitat clearance and the introduction of predatory mammals combined to cause a catastrophic decline in numbers to only 51 in 1995.

Another factor in their near extinction is that kakapo breed infrequently. This is because they rear their young on the fruits of native trees. These trees - pink pine and rimu – only fruit every 2-6 years and kakapo only breed on those occasions.

A new interpretation of data from NASA’s Viking landers indicates that 0.1% of the Martian soil tested could have a biological origin.

Dr Joop Houtkooper of the University of Giessen, Germany, believes that the subfreezing, arid Martian surface could be home to organisms whose cells are filled with a mixture of hydrogen peroxide and water. Dr Houtkooper described how he has used data from the Gas Exchange (GEx) experiment, carried by NASA’s Viking landers, to estimate the biomass in the Martian soil.

Observations of solar flares by spacecraft at Mars, Venus and the Earth show that eruptions on the far side of the Sun may affect our “space weather” back on Earth.

In December 2006, a series of solar flares produced in a single active region were observed from three different points, each approximately 120 degrees apart.

Opponents of gay marriage in the United States state that nuclear families have always been the standard household form. Turns out this may not be true. While gay marriage itself may not have happened in medieval times there is evidence that homosexual civil unions did and that could lend important historical insight to the debate.

Allan A.

Katherine Franz, an assistant chemistry professor at Duke University, says the key to battling neurological diseases like Parkinson's and Alzheimer's diseases may lie in binding up iron and then separating the good from the bad.

Her approach, with graduate student Louise Charkoudian, is to formulate sensitive chemical sentinels they call "pro-chelators." Those are metal-binding agents wrapped in chemical "cages" so they can enter the brain and wait in reserve until they encounter a site of potential damage.

Such a site contains both iron and the molecule hydrogen peroxide. The reaction between these two players -- known as a "Fenton reaction" -- can lead to the production of a highly reactive oxygen-containing chemical group called a hydroxyl radical, Franz said.