Time for a thought experiment: Imagine for a moment that global catastrophe struck and you needed to rebuild everything. How would you do it? It’s a topic astrobiologist Lewis Dartnell has been pondering for some time, and in this talk he shares some findings related to three key areas that foster the development of civilization: food, fire and science.

TEDArchive presents previously unpublished talks from TED conferences.
Enjoy this unedited talk by Lewis Dartnell.
Filmed at TED in 2015.