Did life start more than once?

The way life emerged on Earth is being reconsidered – but not without some disagreement. Journalist Asher Elbein joins host Krys Boyd to discuss how one discovery in Africa is having scientists radically rethinking when life emerged, what it means that this life existed in the harshest of conditions and why it’s dividing the scientific community. His article “Life’s Big Bangs” was published in Scientific American.