the BBC World News, the Russian
space project, Znamya, has been trying to place
a large mirror in space in order to reflect the sunlight
down on northern cities.
The tallest human
on record was 8 feet 11.1 inches
tall. Robert Pershing Wadlow (1918-1940) would
have needed a 54 inch mirror
to see himself from head to toe.
A reflection is an isometry,
a geometric motion that preserves distance.