We all know about the five senses: sight, sound, smell and taste. But
there are sounds no human ear can hear, scents no-one can smell, colours
our eyes cannot detect, waves of radiation that pass right through us
without our noticing ... but known and used by many different animal
species. They have their dangers as well as their uses, but are vital to
all life on Earth. This fascinating unseen and secret world is revealed
in Catherine Barr's latest book. Fourteen colourful spreads display the
impact on human and animal life of: Microwaves Ultra-violet and
infra-red light Electromagnetic waves Ultrasound and infrasound Scents
and smells beyond human detection Understanding these hidden forces
enables us to use them in many ways, from photographing babies not yet
born, to doors that automatically open, or tracking migratory animals.
But many animals also use them. They help cats to catch mice, elephants
to find mates, vampire bats to find victims. Ants 'talk' by exchanging
smells. Indeed, without 'Invisible Nature', life on Earth would not
exist at all.