Aion's got the in-game event for you: Picking Up the Past. The past is a litterbug, we tells ya!
Starting today and running through October 5th, Picking Up the Past challenges players on both sides of the faction fence to uncover fossils that are apparently everywhere. Some will be easy to find; others are riding piggyback on dungeon monsters.
Once a player find enough fossils, he or she can can turn them in for a variety of rewards including medals, Abyss relics, consumables, crafting mats, and -- why not? -- couples t-shirts. There are no quests associated with the event; simply find and turn in fossils as fast as you can!