The potentially destructive and constructive outcomes of reversing extinction of wooly mammoths and other bygone animals through CRISPR and other gene-editing technologies are taken stock of in this tour through the story of de-extinction as a scientific idea.

Britt Wray, PhD is an award-winning author and Stanford researcher working at the intersection of climate change and mental health. She is the author of two books, the nationally bestselling Generation Dread: Finding Purpose in an Age of Climate Crisis, and Rise of the Necrofauna: The Science, Ethics and Risks of De-Extinction, which the New Yorker called a "best book of 2017". She is the Director of CIRCLE at Stanford Psychiatry, a research and action initiative focused on community-minded interventions for resilience, climate leadership and emotional wellbeing in the Stanford School of Medicine, and is the founder of the Gen Dread newsletter. Britt has given talks at TED and the World Economic Forum, and her work has been featured in the New York Times, Washington Post, and Guardian, among other publications.