Earth satellite images adapted from photos by NASA via eChalk (eChalk.co.uk).
Planthopper photos courtesy of Malcolm Burrows, zoologist at the University of Cambridge, UK.
Political maps courtesy of MapChart (mapchart.net).
Electricity provision map adapted from a NASA satellite photo.
World shipping routes courtesy of Benjamin S. Halpern, Tomislav Hengl, and Grolltech.
Coral reefs map derived from NASA data.
Last and foremost, this work was made possible by the generosity of Sarah Jean Wolf.