An all new study has found that people all over the world are living longer than ever as the average lifespan has extended by six years than what it was a quarter-century ago.

For the United States alone, the life expectancy rose more than 3 years from 1990 to 2013. For a girl born this year, the life expectancy is around 81.4 years and for a boy it is around 76.3 years. This fact puts American women in the 35th place and men in the 39th across the globe.

This study has been published in the current issue of The Lancet medical journal. It states that there seems to be no upper limit, though one thing is sure that the life expectancies at the high end have grown more slowly.

This study was led by Christopher Murray. He runs the Institute for Health Metrics and Evaluation at the University of Washington. He said, "We haven't yet got any indication that lifespan can't keep growing, at least for a while".
Murray further added that the gender gap is largely due to lifestyle factors, not biology. These factors are that the men smoke and drink more than women and take more risks in life.

The study further found that ever since 1990, roadway accidents have reduced as a cause of death in the USA and so has violence. It was also found that the Alzheimer's, diabetes and kidney disease both have increased.

It was found that violence was the leading cause of premature death in Mexico, Colombia, Venezuela, Brazil and Panama. Then road injuries are a major cause of death in parts of the Middle East and China. Smoking and air pollution account for most of the remaining premature deaths. Alcohol and drug use are leading causes of death all around the world and HIV/AIDS also remains as a major killer.