A giant camera known as SCUBA-2 is being transported to the James Clerk Maxwell Telescope. Rather than detecting visible light, SCUBA-2 will detect submillimeter radiation, which is sensitive to the heat emitted by extremely cold dust in the Universe. This material is associated with the mysterious earliest phases of the formation of galaxies, stars and planets, until now largely undetectable. Typically the dust is at temperatures of about -200 Celsius and so detecting its extremely weak emissions presents a huge technological challenge.