A squid's whole body may be one giant ear

Using a laser-based imaging technique, researchers at Case Western Reserve mapped every inch of young longfin inshore squid and found them studded with hair-like sensor cells — the same kind that let our inner ears hear. Unlike fish, which have uniform sensors, squid tune theirs by length, short and long, like the pitch-tuning of our own ears. The work started as a search for the origins of human hearing, and it could shed light on why hearing fails.