Nowhere

" I didn't doubt the correctness of the information for an instant - I still tend to trust the pronouncements of scientist in the way I trust those of surgeons, plumber, and other possessors of arcane and privilaged information - but I couldn't for the life of me conceive how any human mind could work out what spaces thousands of miles below us, that no eye had ever seen and no X-ray could penetrate could look like and be made of. To me that was just a miracle. That has been my position with science ever since. "
Bill Bryson, A Short History of Nearly Everything


Dear Bill,

the answer is very simple. Nobody knows. The fact that scientists claim to know doesn't actually imply that they do. Today, science is like business - you manage to sell your product and you can make people believe that our planet is expanding, that the inner core is empty space or whatever you are convinced is the truth. You're not selling - bad luck- why should anybody believe you. Even worse - industry will believe the scientists who promise profit - who cares about the evaluation of the facts anymore?
So where is the purist believe in science today? There is none - science is bullshitting crap just in order to publish something because that is all that matters - quantity not quality.

... that book: 

'Consider the fact that for 3.8 billion years, a period of time older than the Earth's mountains and rivers and oceans, every one of your forebears on both sides has been attractive enough to find a mate, healthy enough to reproduce, and sufficiently blessed by fate and circumstances to live long enough to do so. Not one of your pertinent ancestors was squashed, devoured, drowned, starved, stranded, stuck fast, untimely wounded, or otherwise deflected from its life's quest of delivering a tiny charge of genetic material to the right partner at the right moment in order to perpetuate the only possible sequence of hereditary combinations that could result -- eventually, astoundingly, and all too briefly -- in you.' 

Bill Bryson, A Short History of Nearly Everything (2003)

Thanks Enno for leaving books next to the toilet although the habit of reading while 4 other people might need the bathroom is not a good one ;)