People who drink moderate amounts of alcohol and are physically active have a lower risk of death from heart disease and other causes than people who don't drink at all, according to new research. People who neither drink alcohol nor exercise have a 30 to 49 percent higher risk of heart disease than those who either drink, exercise or both.

Researchers are developing new technology that could replace the household light-bulb within three years. Light Emitting Diodes (LEDs), already used in electrical equipment such as computers and mobile phones, are several times more energy efficient than standard light-bulbs. However, because of their structure and material, much of the light in standard LEDs becomes trapped, reducing the brightness of the light and making them unsuitable as the main lighting source in the home.