Neutrinos are known to pass through us at all time.

 

Did they originate at the big bang?

 

And are they still being generated?

 

Do they co-relate with CMBR?

 

 

Please advise.

 

Thanks in advance.

Neutrinos are produced in stars, as part of the fusion process.

And are they still being generated?

 

Beta decay- and beta decay+ of radioactive element is the most common way neutrinos are produced on Earth.

http://en.wikipedia.org/wiki/Beta_decay

 

Double decay is one of neutrino-less nuclear transmutations.

http://en.wikipedia.org/wiki/Double_beta_decay

There are ongoing experiments observing solar neutrinos.

 

http://en.wikipedia.org/wiki/Solar_neutrino_problem

Search keywords "primordial neutrinos".