Experts said protrusions on the otherwise smooth belly of the shuttle could disturb the air flow during re-entry, causing turbulence that raises temperatures on heatshield tiles downstream.
If you ignore the swollen protrusions on their chests and the general swelling of their bodies, if you ignore their tendency to twist their faces wildly, with some experience you can distinguish between the ugly ones and the pretty ones, and this one would definitely have been considered pretty.