I enjoy your events a lot, and I hope you continue to make more!
I have noticed a couple of problems with them, hope you don't mind me sharing:
FILE: waliens.event
PROBLEM: From reading the event, you should be granted a Research Bonus, but it's not working.
REMEDY: Use the Attribute 9 rather than 8. Don't feel bad for making this mistake, all the stock GalCiv events have the same error. 8 is supposed to be Defense Bonus, but I'll be darned if I can get that to work. Either its bugged or its effects are hidden.
FILE: lifeform.event
PROBLEM: Set as a Colonial event (EventType = 0), but it uses the Random event attributes (107 + 108).
REMEDY: Up to you. Perhaps you meant to make it a Random event, in which case just set EventType = 1. If you do want it to be a Colonial event, change the attributes. Oddly enough, it will sort of work. In testing, I'd get a message saying its going to jump up my Research by 1%, but in practice my Research would zoom +117% percent Civ-wide! I think this points out that using Random attributes for Colonial events causes some fubar'd results.
Other than that, your events work great. And I want to thank you for showing me that Attribute 200, cold hard cash, works for Colonial events too. I have to go change my Writer now.
Keep up the great work!