I'd surprised to find that they are undetectable by electric or magnetic means. I mean, can you really hide the magnetic or electric signature of a big sub?
Someone has already thought of this - http://en.wikipedia.org/wiki/Magnetic_anomaly_detector
With over 6 billion 1% possibly looks like a natural population control mechanism.
Which part of "[The mutation's] effects don't occur until after the childbearing years." did you fail to grasp?
Capitol Records, Inc., a Delaware corporation; Sony BMG Music Entertainment, a Delaware general partnership; Arista Records, LLC, a Delaware limited liability company; Interscope Records, a California general partnership; Warner Bros. Records, Inc., a Delaware corporation; and UMG Recordings, Inc., a Delaware corporation,
Plaintiffs,
vs.
Jammie Thomas,
Defendant.
I rest my case.
UNIX was not designed to stop you from doing stupid things, because that would also stop you from doing clever things. -- Doug Gwyn