Two teams of astronomers have used computer models to look back nearly 13 billion years, when the Universe was less than 10 percent its present age, to determine how quasars - extremely luminous objects powered by supermassive black holes with the mass of a billion suns - regulate the formation of stars and the build-up of the most massive galaxies.

Using a combination of data gathered from powerful radio telescopes and supercomputer simulations, the teams found that a quasar spits out cold gas at speeds up to 2000 kilometers per second, and across distances of nearly 200,000 light years - much farther than has been observed before.

Diabetes has been described as an epidemic of modern times so why does it affect aboriginal people more?

Over the past several decades diabetes has become a prevalent health concern among Canada's First Nations communities, but it wasn't always so.

Organic semiconductors are prized for light emitting diodes (LEDs), field effect transistors (FETs) and photovoltaic cells. As they can be printed from solution, they provide a highly scalable, cost-effective alternative to silicon-based devices. Uneven performances, however, have been a persistent problem. Scientists have known that the performance issues originate in the domain interfaces within organic semiconductor thin films, but have not known the cause. This mystery now appears to have been solved.

A new study has identified genes involved in long-term memory in the worm as part of research aimed at finding ways to retain cognitive abilities during aging.

The study identified more than 750 genes involved in long-term memory, including many that had not been found previously and that could serve as targets for future research, said senior author Coleen Murphy, an associate professor of molecular biology and the Lewis-Sigler Institute for Integrative Genomics at Princeton University.

Some suggest that the universe naturally produces complexity. The emergence of life in general and perhaps even rational life, with its associated technological culture, may be extremely common, argues Kelly Smith, Associate Professor of Philosophy&Biological Sciences at Clemson, in a recent Space Policy paper.

What's more, he suggests, this universal tendency has distinctly religious overtones and more knowledge of astrobiology may even establish a truly universal basis for morality.

UK doctors subject to complaints procedures are at significant risk of becoming severely depressed and suicidal, reveals research published in the online journal BMJ Open.

Those referred to the UK professional regulator, the General Medical Council, seem to be most at risk of mental ill health, the findings suggest.

The researchers base their findings on an anonymised online survey of more than 95,000 UK doctors in 2012, all of whom were members of the British Medical Association (BMA).