In the late 1990s, the James Clerk Maxwell Telescope, with its Submillimetre Common‐User Bolometric Array (SCUBA), gazed deep into space. The array, built at the Royal Observatory, Edinburgh, in Scotland, looked for submillimeter (100–1000 &mgr;m) radiation, and saw significant quantities of luminous matter. Observers reasoned that SCUBA had seen high‐redshift (z) analogs of infrared emissions from dust heated by starlight in low‐zgalaxies.