Can physical symptoms in depression be a consequence of low energy production rates? A report in the March issue of Psychotherapy and Psychosomatics introduces a new hypothesis regarding the mechanisms of physical symptoms in depression: it states that energy production rates toward the lower end of the spectrum may predispose the individuals to develop depression and its physical symptoms.

The Authors hypothesized that decreased ATP production rates in mitochondria underlie depressive disorder with very high levels of somatization. They assessed muscle mitochondria in depressed patients as well as somatic symptomatology with 3 self reported scales (Somatic Anxiety, Muscular and Psychasthenia) from the Karolinska Scales of Personality.

At the end of the study, on each of the 3 Karolinska Scales of Personality, virtually every patient with very high levels of somatic symptomatology demonstrated muscle ATP production rates below the control range in the scales.

NASA's Cassini spacecraft tasted and sampled a surprising organic brew erupting in geyser-like fashion from Saturn's moon Enceladus during a close flyby on March 12. Scientists are amazed that this tiny moon is so active, "hot" and brimming with water vapor and organic chemicals.

New heat maps of the surface show higher temperatures than previously known in the south polar region, with hot tracks running the length of giant fissures. Additionally, scientists say the organics "taste and smell" like some of those found in a comet. The jets themselves harmlessly peppered Cassini, exerting measurable torque on the spacecraft, and providing an indirect measure of the plume density.

Tiny prehistoric bones found on an Australian farm have been directly linked to a strange and secretive little animal that lives today in the southern rainforests of South America.

The mystery? They are separated by an ocean and millions of years.

The fossilised ankle and ear bones are those of Australia's earliest known marsupial, Djarthia, a primitive mouse-like creature that lived 55 million years ago. It is a kind of Australian Eve, possibly the mother of all the continent's unusual pouched mammals, such as kangaroos, koalas, possums and wombats.

But a new study has confirmed that Djarthia is also a primitive relative of the small marsupial known as the Monito del Monte – or "little mountain monkey" – from the dense humid forests of Chile and Argentina.

Researchers from Spain and Croatia led an investigation into the peculiar lifestyle of numerous spider species, which live, feed, breed and ‘walk’ in an upside-down hanging position. According to their results, such ‘unconventional’ enterprise drives a shape in spiders that confers high energy efficiency, as in oscillatory pendulums.

The great majority of land animals evolved to use the ground as the main support for their motion. Accordingly, they evolved legs capable of supporting the weight of their whole bodies, enabling them to move around with their heads above their feet.

However, many spider species found it more convenient to literally turn their world upside down. They spend most of their lives hanging suspended by their legs, and ‘walk’ by swinging under the influence of gravity.

A new study reviewing 75 group-randomized cancer trials over a five-year stretch shows that fewer than half of those studies used appropriate statistical methods to analyze the results. The review suggests that some trials may have reported that interventions to prevent disease or reduce cancer risks were effective when in fact they might not have been.

More than a third of the trials contained statistical analyses that the reviewers considered inappropriate to assess the effects of an intervention being studied. And 88 percent of those studies reported statistically significant intervention effects that, because of analysis flaws, could be misleading to scientists and policymakers, the review authors say.

Everyone experiences anxiety from time to time – something specific, like going down into a dark cellar where you know the Book of the Dead is waiting,or, in a more general sense, trepidation about what the future holds. Some people are gripped by powerful fears when confronted by quite normal everyday situations. For example, sufferers of agoraphobia frequently have panic attacks when caught up in a crowd.

Their blood 'curdles' or 'freezes in their veins' in a very real way, saya a Bonn-based research team, and it leads to increased risk of thrombosis or heart attack

The symptoms can be dramatic: palpitations, sweating, shaking, blind panic or fainting – even leading to death. Another anxiety disorder frequently encountered can be described as social phobia. Those affected fear above all situations in which they become the centre of attention in a group. They begin to stutter or turn red. In order not to avoid embarrassment, social phobia sufferers may become recluses, shying away from human contact and staying at home.