Rachel Sussman shows photographs of the world's oldest continuously living organisms -- from 2,000-year-old brain coral off Tobago's coast to an "underground forest" in South Africa that has lived since before the dawn of agriculture.

Artist Rachel Sussman aims to connect personal time to cosmic time as a means to activate long-term thinking. ​Through her ​ephemeral artworks about eternity, including a sand mandala of the Cosmic Microwave Background and a timeline of the history – and future – of the spacetime continuum​ stretching from before the Big Bang through to 10x101 b...