It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

×
Do I need to keep every part that I've been researching in order to take advantage from what I've learn?
no. as long as the research is done (and the lesson learned), you can throw away the researched items (those that cannot be used, anyway).
Post edited April 01, 2013 by voodoo47
Thanks for such quick answer, and sorry for me bad engrish
me see no bad engrish