Interesting videos

• Great idea: sell the Vatican - kind of a joke but kind of not.
• The science of love (and cheating)
• How social situations can contribute to make a hero (or a monster).  More subtly: how being a hero means being a deviant.
  
• Value systems of conservatives and liberals
• Something to view when your computer doesn't exhibit ease of use.
• A long and entertaining list of all the things we do not know.
  

Unsurprisingly, four of these are TED talks.