Link dump: 2009.07.04

From the four corners of the web:

• The Economist: The evolutionary origin of depression: Mild and bitter: Depression may be linked to how willing someone is to give up his goals
• Daily Galaxy: Stephen Hawking: "Humans Have Entered a New Stage of Evolution" But we are now entering a new phase, of what Hawking calls "self designed evolution," in which we will be able to change and improve our DNA.
• Tibetan Monks and Nuns Turn Their Minds Toward Science - NYTimes.com: Dalai Lama tells monks and nuns to study physics, biology, neuroscience, math and logic.