Tom Anderson wrote:
Now, somebody tell me why there's a factory in Croydon with a number
written in binary on the roof:

http://maps.google.co.uk/maps?f=q&hl...&t=k&z=19&om=1

It's not a binary number, it's an arrangement of skylights. The southern
number alternates 1s and 0s, and the northern one nearly does, which
suggests that the similarity to ones and zeroes is coincidental. If you look
at the building further north, it has similar skylights but in a less
interesting pattern.