The ten closest political races in US history
This year's Iowa caucuses place third. Google has produced some very rich data on the caucus results.
At age 70, Stephen Hawking says women remain "a complete mystery"
He's done groundbreaking thinking about things like black holes, but it's the female of the species that puzzles him
Old photos, re-positioned in the present
The very clever DearPhotograph.com invites people to take old pictures and re-shoot the very same place and tell a micro-story about what's changed