Barbara Frederickson, a leading international authority on the importance of positive emotions, says humans are genetically programmed to seek positive emotions such as love and joy.
Transparency International recently ranked Yemen 146 out of 178 countries on their 2010 corruption perception index, ahead of only Iraq, Somalia, and Sudan in the region.
Now the world's leading online travel company, Expedia started life as an experiment from a company not usually given credit for its Internet smarts - Microsoft.
Spreading the investment in this manner has enabled the BBC to maintain its position at the leading edge of technology, delivering breathtaking images of cinematic breadth and forensic precision.
A new effort led by Canoe Ventures, a coalition of leading cable providers, aims to make interactive advertising available across America later this year.