Though mid-century plutonium has emerged as the frontrunner for the new epoch's golden spike, a tidal wave of other signals are also coupled with its rise. Some of these signals in the rock, like plutonium, sulfur, and DDT have been largely curbed through hard work and local, national, and international restrictions. Others, like greenhouse gasses, plastics, and biomass loss, continue to rise with dire consequences. Follow the search for the golden spike here to learn more about each site as the science continues to unfold.