1 Deputy Editor, Science Advances; Foundation Professor, School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, USA. *Corresponding author. Email: kip.hodges@aaas.org.
2 Deputy Editor, Science Advances; Geosciences Research Division, Scripps Institution of Oceanography, UC San Diego, CA 92093, USA. *Corresponding author. Email: jeremybcjackson@gmail.com.