In this episode we discuss how light has enabled us to communicate and display images to each other across continents, locate yourself to within a few meters anywhere on earth and to look back in time and see images across the depths of space including black holes which were imaged for the first time in 2019. Find out the answers and much more here! Hosted by David McGovern. Special thanks to our guest John Mackey. This podcast is created by Irish Photonic Integration Centre in partnership with Science Foundation Ireland. Special thanks to our producer Kieran Hurley from University College Cork UCC 98.3FM radio. For more information visit our website https://www.ipic.ie/engagement/podcast/.