Hacker News on 18 November 2007

• Flash Physics Engine
• Ask YC: Should Fridays and Saturday nights matter to a young hacker?
• Scribd in the Wall Street Journal
• Ask YC: Getting In the Zone?
• Saul Griffith on winning a MacArthur, entrepreneurship, and dumpster diving
• Einstein's Arrogance
• Origin of Quake3's Fast InvSqrt()
• Race, genes and intelligence
• Facebook's Brilliant but Evil design
• Knuth vs. Email