1. American Museum of Natural History. Carl Sagan and the search for life. Cosmic Horizons. https://www.amnh.org/learn-teach/curriculum-collections
2. Bronselaer, B., et al. (2018). Change in future climate due to Antarctic meltwater. Nature, 564(8), 53–58.
3. Carl Sagan and the search for life. Part of the cosmic horizons curriculum collection. https://www.amnh.org/learn-teach/curriculum-collections/cosmic-horizons-book/carl-sagan-quest-for-life
4. Cielski, P. F. History of Planet Earth, University of Florida. National Geographic, BBC Nature.
5. Robock, A., & Toon, O. B. (2012). Self-assured destruction: The climate impacts of nuclear war. Bulletin of the Atomic Scientists, 1 September, 2012.