"On this earth there is indeed a tiny corner of the universe accessible
to other senses [than the sense of sight]: but feeling and taste act
only at those minute distances which separate particles of matter
when 'in contact:' smell ranges over, at the utmost, a mile or two,
and the greatest distance which sound is ever known to have traveled
(when Krakatoa exploded in 1883) is but a few thousand miles--a mere
fraction of the earth's girdle."--Prof. H. H. Turner of Oxford.