While scientists may be able to distinguish natural from artificial signals arriving from a particular location, what will be much more difficult will be the decoding of the signals which are identified as intelligent - a task not too dissimilar from that undertaken by cryptologists studying ancient writing.
This would suggest, to anyone with a modest knowledge of mathematics, that the bits should be arranged in 73 columns of 23 bits each with the zeroes replaced by white squares and the ones replaced by black squares.
• Further down is the chemical structure of DNA, with a double helix wound around the number of pair bases that exist in a single human chromosom...
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