I know a pool, where shadows fall / From fir-trees, melancholy tall, / That dream and quiver round the rim, / And in the molten centre swim, / Where taper tops do all unite / Bemirrored in its silvern light.

Chaitin's constant is a non-computable number.

Yet you could hunt for slaves in the countries round about: Celtic Christians of the far West, generally treated as heretics; Islam; Slavonic, Baltic or Finnish 'paganries'

The authors randomly sampled 100 coinbases from the last 20,000 blocks of the blockchain that by the time of the experiment had the highest block-height at 247,054.