Spectroscopy

Once upon a time there was a muddy puddle. Having been muddy-puddling about all day, when evening came she was very, very tired.  
But her luck was in: as she eased her shoulders down into the little hollow in the rock, sighing a contented sigh as she did so, 
she marveled - and not for the first time - at just how amazing it was that, right down to the tiniest indentation, that little hollow
should be exactly the right shape for her. Truly, it must have known she was coming.  But then, she was only a muddy puddle
and had, therefore, only a muddily-puddily understanding of such things.
                                      -From New Scientist Print Edition, 11 August 2007