The sentence that best helps the author establish his credibility as an expert is:
"In truth, I don’t have to look at all, because university press offices fill my inbox with examples every day: The Harvard scientists who hope their study of cuttlefish skin will 'inspire improved protective camouflage for soldiers on the battlefield.'"
This sentence suggests that the author is well-connected in the academic community and is informed about current research, enhancing his credibility as someone knowledgeable about the topic.