This is the first episode of the ALMA series "#WAWUA – Why Astronomers Want to Use ALMA?". With colourful artwork and clever animations, these short videos delve into topics that explain the fundamentals of radio astronomy, including interferometry, astrochemistry, the basics of light and the electromagnetic spectrum, the hidden features of the “cold” Universe, and the origin and destiny of stardust. <br /> <br />Credit/Courtesy: ALMA (ESO/NAOJ/NRAO); María Corrêa-Mendes et al.
