Well... let me offer a small contest - I called it Knowledge Horizon Contest, and you'll find out why in a couple of minutes: 1. Everyone who wishes to enter the contest has to post a single question in this thread till Friday 22 APR 0:00 GMT. The poster is recognized as an author of the question, till the end of the contest. 2. It can be any question - regarding physics, astronomy, biology, math, computer science, etc... The only restrictment is that You should know the correct answer to the question yourself. Also i suggest not posting history/literature and other location/nation-specific questions for it is not fair with respect to others ;) however Earth Science/Georgaphy - is welcomed! i hope you got what i mean :) 3. After all questions are in, the solution period starts! Once a player solves a problem he/she sends the solution as a private message to the corresponding author. You have only one chance to send the solution in, regardless if it is true or false... as soon as the author receives and checks the solution - he/she has to PM back to the sender and notify him whether he succeded. Solutions are considered during a week from the start of the contest, e.i. the contest is over at 0:00 GMT, Friday 29th April. 4. After that each author has to post a valid solution to his problem, and a list of contestants who solved it. (maybe he has to post all of the solutions as well, to make sure he hadn't miss something) 1 solved problem = 1 point. (however it is better to create a corresponding weight for the problem, depending on the number of contestants who solved it) One with most points is the WINNER! what do you think? ready to go? :) P.S. yes, the amount of fun depends on the honesty of contestants - no cheating - fair play!