How many neutrinos are there in a cubic in inch?

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How many are there in a cubic in inch?
 
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The number density of each neutrino species is theorized to be about 56 per cubic centimeter, for a total number density of around 150 neutrinos per cubic centimeter.

That's about 2500 per cubic inch.

- Warren
 
where did you get that information, if you don't mind my asking
 
Simpson, John J., The Sudbury Neutrino Observatory, AAPT Summer Meeting, AAPT Announcer 30, 71, Summer 2000

- Warren
 

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