ALMA observations have revealed that a very distant galaxy, seen when the Universe was just 4% of its current age, was rich in cosmic dust. This ESOcast Light quickly looks at what this means and why it is important.The video is available in 4K UHD.The ESOcast Light is a series of short videos bringing you the wonders of the Universe in bite-sized pieces. The ESOcast Light episodes will not be replacing the standard, longer ESOcasts, but complement them with current astronomy news and images in ESO press releases.More information and download options: http://www.eso.org/public/videos/eso1...Subscribe to ESOcast in iTunes! https://itunes.apple.com/podcast/esoc...Receive future episodes on YouTube by pressing the Subscribe button above or follow us on Vimeo: https://vimeo.com/esoastronomyWatch more ESOcast episodes: http://www.eso.org/public/videos/arch...Find out how to view and contribute subtitles for the ESOcast in multiple languages, or translate this video on dotSUB: http://www.eso.org/public/outreach/pa...Credit:ESOEditing: Herbert Zodet. Web and technical support: Mathias André and Raquel Yumi Shida. Written by: Thomas Barratt and Lauren Fuge. Music: Jennifer Athena Galatis. Footage and photos: ALMA (ESO/NAOJ/NRAO), NASA, ESA, ESO and D. Coe (STScI)/J. Merten (Heidelberg/Bologna)/spaceengine.org/Digitized Sky Survey 2, M. Kornmesser and P. Horálek. Directed by: Herbert Zodet. Executive producer: Lars Lindberg Christensen.