There may be far fewer galaxies further out in the Universe then might be expected, suggests a new study based on simulations and published this week in the Astrophysical Journal Letters.

The simulations show the first results from the Renaissance Simulations, a suite of extremely high-resolution adaptive mesh refinement (AMR) calculations of high redshift galaxy formation and hundreds of well-resolved galaxies. 

"Most critically, we show that the ultraviolet luminosity function of our simulated galaxies is consistent with observations of redshift galaxy populations at the bright end of the luminosity function, but at lower luminosities is essentially flat rather than rising steeply," wrote researchers in their paper. 

Television commercials assure us that probiotic products are good for our health, with claims ranging from improved digestion to managing allergies and colds,

If so, why wouldn't plants also benefit from certain microbes?

Quarks and antiquarks are the teeny, tiny building blocks with which all matter is built, binding together to form protons and neutrons in a process explained by quantum chromodynamics (QCD).

According to QCD, quarks possess one of three charges that allow them to pair in various combinations, such as mesons--elementary particles composed of one quark and its corresponding antiquark. Force carrier particles, known as gluons, hold the quarks together by exchanging and mediating the strong forc e, one of the four fundamental forces.

This structure is the foundation of all matter in the universe, but much is still unknown about why QCD works the way it does.

A research group has made a breakthrough discovery which could help thousands of young girls worldwide who are suffering from a rare yet debilitating form of epilepsy. The United States pharmaceutical company Marinus Pharmaceuticals is now recruiting affected girls as part of the world's first clinical trial to test the therapy. 

Professor Jozef Gecz, from the University of Adelaide's Robinson Research Institute, was a key player in identifying the responsible gene and mutations in this female-only epileptic syndrome, in 2008 and has now found a treatment for this disorder.

One of the questions raised by the prospect of climate change is whether it could cause more species of animals to interbreed. Two species of flying squirrel have already produced mixed offspring and those have somehow been blamed on climate change, along with a hybrid polar bear and grizzly bear cub (known as a grolar bear, or a pizzly). 

A paper in Nature Climate Change tallies the potential number of such pairings and across North and South America it estimates that only about 6 percent of closely related species whose ranges do not currently overlap are likely to come into contact by the end of this century. 

One Shake Shack French fry may lead you to eat a whole batch, and don't even get started on the power of Doritos. According to a new study using rats, that high-fat indulgence literally changes the populations of bacteria residing inside the gut and also alters the signaling to the brain.

The result? The brain no longer senses signals for fullness, which can cause overeating--a leading cause of obesity. 

The findings presented this week at the Annual Meeting of the Society for the Study of Ingestive Behavior liken a high fat diet to how a sudden significant shift in temperature might impact the people who live in the affected area: Some people will be fine. Others will become ill.