His research began with fruit flies, but over the last two decades, his focus has been on parasitic protozoa, single-celled organisms that cause major diseases.

VOA: standard.2010.04.05

Mr.Orban,47,told parliament that he realizes he takes over a country mired in political tensions and struggling to overcome its deepest recession in nearly two decades.

VOA: standard.2010.05.29

Statistics from Australia's National Tidal Center show sea levels have increased by 8.6 millimeters a year off Perth and by 8.1 off the tropical Kimberley region over the past two decades.

VOA: standard.2009.11.09

"We believe that, with the experience of Thailand handling this situation in the past two decades, where at times there were several hundred thousand came over the Thai borders this is,on one hand,serious issue,"

VOA: standard.2009.06.09