The Sierra Club has you beaten. They've quoted the volume of nuclear waste in cubic liters. -- Gene Why do only bad things come in cubic liters? I saw a GreenPeace flyer celebrating the sabotage of a drainpipe dumping "thousands of cubic liters of pharmaceutical waste" into the ocean. Unfortunately, the photo showed only three-dimensional damage, leaving hundreds of square gallons unspilled, resulting in attacks by fifteen pound purple jellyfish: http://sanfrancisco.cbslocal.com/2015/06/12/big-purple-sea-slugs-wash-ashore... --rwg From: rwg <rwg@sdf.org> To: math-fun <math-fun@mailman.xmission.com> Sent: Wednesday, June 24, 2015 6:28 PM Subject: Re: [math-fun] Fano Plane puzzle On 2015-06-24 17:07, Dan Asimov wrote: On Jun 24, 2015, at 3:22 PM, David Wilson <davidwwilson@comcast.net> wrote: Sadly, it would difficult to make an office toy in R^6. Not at all. In R^6 they have even better machine shops than we do. —Dan And the wealth to operate them. Like I was just telling the kids, On Wed, Jun 24, 2015 at 7:19 AM, Bill Gosper <billgosper@gmail.com> wrote: Subj: Scrooge McDuck was said to have three cubic acres of money. How much is that in square gallons? In[169]:= UnitConvert[Quantity[3, "Acres"]^3, Quantity["Gallons"]^2] Out[169]= Quantity[95610810544128000000000000000000000000000000000000000/ 765615812545937377500183749853000049, ("Gallons")^2] Oops, that's 27 cubic acres! Should have been In[170]:= UnitConvert[Quantity[3, "Acres"^3], Quantity["Gallons"]^2] Out[170]= Quantity[10623423393792000000000000000000000000000000000000000/ 765615812545937377500183749853000049, ("Gallons")^2] I hate it when ducks exaggerate. --Bill -----Original Message----- From: math-fun [mailto:math-fun-bounces@mailman.xmission.com <mailto:math-fun-bounces@mailman.xmission.com>] Dan Asimov Sent: Wednesday, June 24, 2015 3:30 PM But there could be beautiful configurations for the Fano plane in higher dimensions. Maybe in 6-space, where the vertices of the unit simplex s_6 form 140 unit equilateral triangles.