Hughes observed in his book Sensory Exotica ​ — A World Beyond Human Experience, “we are obviously a long way from understanding these and other mysteries of nature. ”
Hughes täheldab oma raamatus „Sensory Exotica – A World Beyond Human Experience ”:„ Need ja muudki looduse mõistatused jäävad meile ilmselt veel kauaks saladuseks. ”