Redoubt Mini-update for 2/8/2009

Why do we tip waitstaff and cabdrivers but not flight attendants and retail clerks?

Throughout the world, traditional political organizations are increasingly seen as dysfunctional. But can democracies live without them?

Scientists have been chasing the dream of harnessing the reactions that power the Sun since the dawn of the atomic era. Interest, and investment, in the carbon-free energy source is heating up.

Dive into five philosophical schools that have faded into obscurity but still whisper through the ages.

Does humanity have a moral imperative to seed life on lifeless worlds? And should we avoid colonizing a planet if life already exists there?