On 8/31/2016 3:22 PM, Igor PDML-StR wrote:
I came across this relatively recent shot. And I thought it might be a good puzzle for those who haven't seen it in person. (I assume that at least 1-2 PDMLers have seen it, - if so, - please don't spoil the fun for others prematurely.) http://42graphy.org/misc/puzzle_IR32392.jpg Cheers, Igor
Just a SWAG, but it looks like the corner of a block of carbon-fiber insulation.
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