so, question

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Neutrinos they are very small.
    They have no charge and have no mass
And do not interact at all. 

The earth is just a silly ball
    To them, through which they simply pass,
Like dustmaids down a drafty hall
    Or photons through a sheet of glass. 

    They snub the most exquisite gas,
Ignore the most substantial wall,
    Cold-shoulder steel and sounding brass,
Insult the stallion in his stall,
    And, scorning barriers of class,
Infiltrate you and me! Like tall
And painless guillotines, they fall
    Down through our heads into the grass. 

At night, they enter at Nepal
    And pierce the lover and his lass
From underneath the bed — you call
    It wonderful; I call it crass.


—John Updike 

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Every second, hundreds of billions of these neutrinos pass through each square inch of our bodies, coming from above during the day and from below at night, when the sun is shining on the other side of the earth! 

—M.A. Ruderman and A.H. Rosenfeld
An Explanatory Statement on Elementary Particle Physics,
American Scientist

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