How much vertical clearance is needed to frame a window opening? [more inside]
posted by Sweetie Darling on Jun 20, 2009 - 7 answers

What are some objective criteria/metrics by which to measure progress towards success or failure in a war or other extended conflict? [more inside]
posted by EatenByAGrue on Jan 13, 2008 - 18 answers

What else can be sensed passively? [more inside]
posted by viewofdelft on Jul 17, 2007 - 17 answers

"A human is halfway in size between an atom and the known universe"... This is a paraphrased quote I have come across several times. I like it. Who said it first? How true is it in the most literal sense? And, finally, what errors arrive in postulating a universe, or an atom, which can be measured AT ALL from our singular, relativistic, perspective? [more inside]
posted by 0bvious on Feb 18, 2007 - 14 answers

is it possible to measure exactly how tired someone is? how would that be done?
posted by ronenosity on Jul 22, 2005 - 9 answers