Brain-controlled robot prosthetics are usually used to restore lost motor function. But scientists from Japan have used the technology to give wearers a "third arm," controlled by their brain, that they can use to multitask.

In an extensive investigation into the relationship between our genes and our diet, scientists have identified nearly 500 genes that seem to play a significant role in determining our food choices. This discovery opens up the potential for utilizing an individual's genetic information to formulate personalized nutritional plans aimed at boosting health and warding off disease.

A DNA vaccine tested in mice reduces accumulation of both types of toxic proteins associated with Alzheimer's disease, according to research that scientists say may pave the way to a clinical trial.