Sexual selection emphasises the development of characteristics that demonstrate in a way that cannot be faked just how fit that characteristic's possessor is to father (or mother) another individual's offspring.

ECONOMIST: Come up and see my etchings

"We are collecting in-service aircraft components to asses the remaining characteristics and capability in terms of stress and fatigue, " says Olivier Malavallon, project director of business development and change at Airbus.

CNN: The place where dead airplanes come back to life