It's not quite transparent aluminum...
- ... but it's along the line. A company called LiTraCon has
started making translucent concrete. Take a look at
and search for "LiTraCon".
Relativity: A grook with no reference whatever to the two-party system
To wear a shirt that's relatively clean,
You needn't ever launder off the dirt
If you possess two shirts to choose between
and always change into the cleaner shirt.
-- Piet Hein