Riddle: What do brussel sprouts, the Tower of Pisa, and clouds have in common?

Answer: All are made up of older things, none of which are new either. The Earth is a study in recycling, Naturally. The combinations may be original or linear, but the parts of the recipe hand themselves down through time. They may reform themselves, or be impacted by varioius forces, but Nothing is truly, entirely New.

Even Rhinos.