https://screenrant.com/10-most-confusing-far-side-comics-gary-larson/
What should be a plain silhouette of a rhinoceros in the moonlight instead appears as a hodgepodge of animal parts strewn together at odd angles. The upper-crust suggestion of the rhinoceros being “in repose” treats it as if it is a high-class work of impressionist modern art. The fact that it looks like it was drawn by a child adds to the ultimate humor of the strip.
*sigh*
According to the actual article the samples acquired and packed before takeoff, and tested after landing. Having them extracted during parabolic maneuver... is due to another (Ig Nobel candidate) research.