Colonization Events in Endless Space sometimes occur when you settle a planet. These events can have positive or negative impacts (citation needed!) on the player's Empire and affect players individually. There are X main classifications of Colonization Events: Positive, Negative, and Interactive (citation needed, these just came out!)
Positive Events produce a positive outcome for the player's empire only.
"Though your colonists place their first city not far from an ancient ruin - with access to water and flat land it is logical - something about the ruins are odd and unusually alien."
- +40 on empire
- +1 per person on Planet <planet> (10 turns).