Why does the sun shine? Why is the sea salty? Why can't we hear dog whistles? Why do we sleep? Why can't we fly? Why do men have nipples? Why does the wind blow? Why does ice float? Why can't we travel faster than light? The answers to these and forty-five other "everyday scientific questions" are collected in this slim yet illuminating little book that's sure to be relished by inquiring minds of all ages!