A Really, Really Big QR Code

QR Codes (those square barcodes) are usually small - a square inch or less, something like that. There's no reason why it couldn't be bigger - a lot bigger. Enter the Kraay family, who has a thing for corn-based mazes. They created a 7 acre QR code out of a big corn field in Alberta, Canada. A seven acre bar code - should be easy for orbiting flying saucers to see, no?

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