Tiny gold stars, smaller than a billionth of a meter, may hold the promise for new approaches to medical diagnoses or testing for environmental contaminants.

Researchers found that the cultural expectation for men is not that they have to be as attractive as their peers, but that they need to be attractive enough to be sexually appealing to women.

Bluefin tuna disappeared from Danish waters in the 1960s. Now the species could become depleted throughout the northeast Atlantic and Mediterranean, according to recent analyses.

A computer model that can predict how people will complete a controlled task and how the knowledge needed to complete that task develops over time is the product of a group of researchers.

A radiological health expert suggests that a form of vitamin D could be one of our body's main protections against damage from low levels of radiation.

Researchers found that reduction or elimination of sugar-sweetened beverages from school menus has little effect on total consumption by adolescents.

Scientists report that a simple decision-making task does not involve the frontal lobes, where many of the higher aspects of human cognition, are thought to originate.

Scientists have thought that one way to foil a tumour from generating blood vessels to feed its growth - a process called angiogenesis - was by creating drugs aimed at stopping a key vessel growth-promoting protein.

The question of whether or not to continue to pursue the development of T-cell-based HIV-1 vaccines has been a source of controversy following last year's widely publicized failure of the field's most promising candidate, a vaccine developed by Merck known as V520.

An international team of researchers have engineered immune cells to act as "bionic assassins" that see through HIV's many disguises.

All biological reactions within human cells depend on enzymes. But how slowly would these reactions proceed spontaneously, in the absence of enzymes?

A team of researchers has made a breakthrough that could lead to new dialysis devices and a host of other revolutionary medical implants.

Phase I results of the first clinical trial of gene therapy for patients with advanced heart failure show the approach to be promising.

A test that reveals brain changes believed to be at the heart of Alzheimer's disease has bolstered the theory that education can delay the onset of the dementia.

Graphene is a perfect example of the wonders of nanotechnology, in which common substances are scaled down to an atomic level to uncover new and exciting possibilities.

A recent study offers the most comprehensive mathematical analysis to date of the mechanisms that drive evolution in viruses and bacteria.

A recent study demonstrates that individual cells that make up such biological organisms as humans have sophisticated methods for managing waste.

Researchers confirmed that some gold particles are better at increasing the rate of a chemical reaction than others, but they also found that a good catalyst sometimes spontaneously turns bad.