With batch 11-011, we have improved the mitotic cycle efficiency by 43%. We have infected 53 raccoons with the new strain. In addition to the now expected size increase, behavioral tests confirmed an increase in intelligence and manual dexterity by 19 points on the Schuler- Kapp index. Unfortunately, several subjects escaped confinement and had to be hunted down and dispatched. Major Barneet ordered the remaining subjects terminated. Two pairs were unaccounted for.
The above excerpt is from the FEV Experiment Disk found at the Glow in Fallout and is the only remaining in-game reference to the non-existent area.