Anti-dengue mosquitoes released in Australia

Some 300,000 mosquitoes with the potential to block the spread of dengue fever have been released in Australia, in a large-scale trial of one of the most promising techniques to rid the world of the disease.Dengue fever infects around 100 million people in the tropics each year, killing 40,000 people annually. Insecticides and nets provide the most effective means to control the disease at present, says Scott O'Neill at Monash University in Melbourne, Australia, but the dengue virus's range continues to grow. In 2009, for instance, it reached Buenos Aires in Argentina for the first time, while France reported its first locally acquired case of dengue fever in 2010

.Last year, O'Neill and colleagues announced plans to release Aedes aegypti mosquitoes infected with a fruit-fly bacterium called Wolbachia. The bacterium makes the mosquitoes less able tocarry the dengue virus, and it could therefore limit dengue transmission if it were to become widespread in the mosquito population.

Billionaire college dropouts

 Bill Gates talked about how Mark Zuckerberg and he have a few things in common. "We both dropped out of Harvard.", Mr. Gates said. "I actually even gave a lecture at Harvard that said, if you have a great idea, don't worry about dropping out and he attended that lecture. So it is a funny connection there."Here's a look at 8 very successful dropouts.

A businessman, designer and inventor. Steve Jobs is best known as the co-founder, chairman and CEO of Apple.Net worth at the time of his death: $8.3 billion

Mark Zuckerberg wrote a program called Facemash in his dorm room at Harvard, that went on to be known as Facebook, the world's largest and most popular social networking site today. Zucker berg dropped out of Harvard University and moved to Palo Alto with Dustin Moskovitz to officially start Facebook.Net Worth: $17.5 billion

Ranked as the world's youngest self-made billionaire, Moskovitz attended Harvard University as an economics major for two years and dropped out to work full time on Facebook with Mark Zuckerberg.Net worth: $3.5 billion 

Chairman and CEO of Dell, Michael Dell became the youngest CEO at the age of 27 to have his company ranked in the Fortune 500 list.Net worth: $15.9

Larry Ellison dropped out of the University of Illinois at Urbana -Champaign due to the demise of his adoptive mother. He is the co-founder and CEO of Oracle.Net worth: $36 billion

Azim Premji was voted among the twenty most powerful men in the world by Asiaweek. Forbes lists him as the third richest Indian and the 41st richest in the world.Net worth: $15.9 billion

A business tycoon, computer programmer and philanthropist, Bill Gates is the Chairman of Microsoft and was ranked as the wealthiest man in 2011. He dropped out of Harvard to join Paul Allen at Honeywell in 1974.Net worth: $61 billion