I'm gonna go out on a limb here and say you should stop going out on a limb, as you're clearly very poorly informed when it comes to these matters. But here's a citation for you: http://economixcomix.com/2014/04/20/neil-degrasse-tyson-on-g...
He'd be the last person to tell you his observations and this anecdote should be seriously used as a citation to lend yourself weight in an argument about the source of gender bias in tech.