Scientific Pursuits

 is a Fallout 3 quest. It is also an Xbox 360 achievement.

After you finish the quest "Scientific Pursuits" go to Elder Owyn Lyons and talk, after you talk to the Elder you have to go to talk a Sciencist named Scribe Rothchild. He will tell you to go down to the A and have to look for the Vault-Tec computer. It took me a long time to find which Vault had the G.E.C.K. The Vault is Vault 87. Go talk to Rothchild and he will tell you what to do from there.