Origins of Life
Sara discusses the complexities surrounding the RNA world hypothesis, highlighting its various interpretations and the significance of RNA as a precursor to DNA. She raises intriguing questions about the possibility of life's origins occurring multiple times on Earth and introduces the concept of a shadow biosphere, suggesting that there may be forms of life existing alongside us that we are yet to recognize.In this clip
From this podcast

Lex Fridman Podcast
Sara Walker: The Origin of Life on Earth and Alien Worlds | Lex Fridman Podcast #198
Related Questions
Why is it proposed that some alien life might be found on Earth in the episode Sara Walker: The Origin of Life on Earth and Alien Worlds | Lex Fridman Podcast #198 and the clip Shadow Biosphere Exploration?
Why is it proposed that some alien life might be found on Earth in the episode \[Sara Walker: The Origin of Life on Earth and Alien Worlds | Lex Fridman Podcast #198} and the clip Shadow Biosphere Exploration?
What is the shadow biosphere as discussed in the episode Sara Walker: The Origin of Life on Earth and Alien Worlds | Lex Fridman Podcast #198 and the clip Shadow Biosphere Exploration?