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The sorts of disturbances produced by cosmic ray particles are too small to be detectable by a capacitive touchscreen; if they were sensitive enough, it wouldn't function so well as a touchscreen - imagine suddenly occurring, mysterious ghost touches.

(If they were sensitive enough the hardware would probably filter these out anyway.)

1 337 647 square meters = 14 398 312.5 square feet [1]

[1] https://www.google.co.uk/#q=1337647+sqm+to+sqft

Ugh, I'm confused by those area conversions. Edited to 1.33 km^2. I believe it sounds right and puts scale into perspective.

There must be some mistake with the numbers as there are around 9 square feet per square meter. (?).