Dear Colleague, We are pleased to circulate the Third Announcement (attached) of the conference "Multi-Object Spectroscopy in the Next Decade: Big Questions, Large Surveys and Wide Fields" to take place on La Palma, Canary Islands from 2-6 March 2015. http://www.ing.iac.es/astronomy/science/bulletin/Third-Announcement.pfg Best regards Ian Skillen (ING) and Scott Trager (University of Groningen) 28 November 2014