A cladogram is a stylized diagram that looks like a series of Y's or forks in a road. At each branch, or Y junction, novel characters of evolutionary origin are used to separate off one group from the rest. Cladograms can be constructed for any group of organisms.
I checked with the bubbly brain on staff, Bruce Sanderson (who reviews Champagne for Wine Spectator), and he says, Champagne can age well. High acidity and carbon dioxide act as preservatives as it ages in the bottle prior to disgorgement. After disgorgement, Champagne will develop like a still wine. If the quality is high (i.e., an excellent vintage-dated bubbly) and it is well stored, Champagne is capable of long aging.
Hennessy Privilege VSOP ($50) has a smooth but stronger flavor than VS, with heavier wood on nose. VSOP (Very Superior Old Pale) is a blend of 60 different eau de vie with the oldest being 15 years, and the youngest 4-5 years. It is aged for up to 15 years in French oak, giving it a deeper, richer color and oak notes on the nose and palate, but also lending more complexity to the spice and grape notes.