posted on Oct, 19 2012 @ 01:16 AM
Likely, nothing. If beings have mastered interstellar travel, they probably have mastered the ability to simply inject, or absorb essential nutrients
for a diet and do not consume food in the same fashion that us humans do. The common picture of aliens is that they are very small, and very skinny,
also requiring them to consume far less to sustain their bodies, for they, presumably, do not have the same muscle mass to sustain.