- Niles Eldredge Homepage http://www.nileseldredge.com
- Pikaia, web magazine dedicated to evolution http://www.pikaia.eu
- The Burned-over District http://www.rollins-eldredge.
- John Templeton Foundation, the major sponsor of the Hierarchy Group Project, it supports several other research projects on science and evolution, http://www.templeton.org/
- Deartment of Biology-University of Padua, headquarters and sponsor of the Hierarchy Group Project, http://www.biologia.unipd.it/
- Nóema – online journal of philosophy, with several sections devoted to the relationship between philosophical thought and the latest advances in science noema.filosofia.unimi.it