MSNBC The Cross Connection With Tiffany Cross June 5, 2021 14:32:00
We believe -- it's highly likely that life in the single cell form is probably ubiquitous across the universe. we start talking about advanced life. if you look at the example of earth, for something around 90% of earth's existence, if you had come here before the last 600 million years, you wouldn't see a planet full of life like you do today. it's only been for the past 600 billion years that we have a species. for those of us who study this, we know earth is so special in so many ways that the chances of repeating this somewhere nearby is incredibly slim. >> all right. so we've got a lot of...