Figure 1.  Cockroach size vs. altitude in the physics building.  Note the striking linear relationship between the approximate size of the cockroaches in relation to their location in the physics building.  As is shown, the larger roaches seem to inhabit the higher floors (mostly the third floor) as opposed to the lower floors.

Location (floor)	Status
1	dead
1	dead
3	alive
3	dead

Table 1.  Status of the subjects with respect to their location in the physics building.  In direct correlation with the size of the roaches (see Fig. 1), we show that one is more likely to stumble across a live and kicking member of this species on the upper floors of the building as opposed to the lower floors.  This shows that the cockroaches on the top floors have a higher survival rate than their counterparts on the lower floors.  This is probably why larger roaches are found on the upper floors, as a higher survival rate would result in longer roach lifespans.  More study is needed to show whether this is due to more abundant food supplies, less activity outside labs, or the lack of wussy girls.