Nemesis: Does the Sun Have a 'Companion'?By Robert Roy BrittSenior Science Writerposted: 07:00 am ET03 April 2001 "The trouble with most folks isn't so much their ignorance. It's know'n so many things that ain't so." -- A favorite quote of Richard A. Muller, by 19th century humorist Josh Billings.When you think big, as Richard A. Muller does, you're bound to create ideas now and then that are so compelling you just can't let go of them -- ideas so outlandish that mainstream scientists are equally eager to dismiss them.Muller, a physicist at University of California at Berkeley, has had...