- Want to know how much money from a certain time was worth in another time? Try measuringworth.com.
- Meat and potatoes Christianity: an iMonk classic from the late Michael Spencer on why he was not a fundamentalist.
- Open course materials from MIT classes: MIT Open Courseware.
- Website for the European Space Agency’s Mars Express mission: http://www.esa.int/SPECIALS/Mars_Express/index.html
