TWiM explains how spindle-shaped Archaeal viruses evolved from rod-shaped ancestors to package a larger genome, and transcriptional recording by CRISPR acquisition from RNA.

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Links for this episode * From rods to spindles (Cell) * Spindle-shaped virus movie (Cell) * Bacteria that record (Science) * Transcriptional recording with CRISPR (Nature) * Letters read on TWiM 266 * TWiM Listener survey