intuitive engineering

I've been willing my daughter to breathe for the last 24 days.  She came down with leukemia.   Acute, dangerous and sudden leukemia that tried very hard to kill her.  Right now she is on an oscillating ventilator, with two chest tubes, daily dialysis, and a wall of IVs you would have to see to believe.  [...]

  Robert Heinlein answered fan mail with a form letter (article by Kevin Kelly; he found an actual copy of the form letter in his own files), sometimes an index card, up until around the early 1980′s. Virginia Heinlein made a comment about the form letter she and Robert used to reply to fan mail [...]