1. Philosophy Referee Signals http://bit.ly/hC6SRH
2. The covers of classic albums, if they were books http://bit.ly/fYSHTa
3. Symmetry: A Split-Screen Exploration of Duality http://bit.ly/e9JE9q
4. The Six Flags over New Orleanshttp://bit.ly/edzUPY
5. Human flight http://bit.ly/em3dbK