Cyclists riding through Beijing smog. Polluted air causes 5.5 million deaths a year new research says. The main culprit is the emission of small particles from power plants, factories, vehicle exhausts and from the burning of coal and wood.
Fearsome: Capable of clearing mines, digging trenches and smashing anything in its path, the Terrier from BAE Systems (pictured) is so versatile it has been dubbed the 'Swiss army knife' of combat vehicles
A Texas A&M Health Science Center cardiologist reveals six common heart disease symptoms that people tend to ignore. These symptoms appear to be mild or insignificant, but can indicate heart failure or disease