Billionaire Paul Allen's foundation is funding a new type of evacuation "cocoon" to help fly sick medical workers from West Africa
If you can't beat them, avoid them.
The Pentagon commits to planning for higher temperatures, and retired generals line up to help
Mobile food startups are moving beyond delivery into food prep
Cities relax or abandon purchasing restrictions in a bid to avoid more serious downturn
Ministry of Supply’s Aviator jacket combines the structure of a tailored garment with the functionality of a windbreaker
The Department of Education may double the number of debt collectors who go after defaulted federal student loans
This year's must-have Silicon Valley office accessory: a $199 bear costume
JOHN MACDOUGALL/AFP/Getty Images
Power 100 rank: 7
Most recent notable achievement: Eight gold medals at 2008 Beijing Games
Earnings: $6 million
Key sponsors: Subway, Speedo, Omega Watches
Why he's on the list: One year later, Phelps continues to shatter his own world records, and with the memory of his Beijing performance still fresh, most sponsors were reluctant to drop the 24-year-old despite photos of his marijuana use.