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Funding for this program is provided by annenberg media. Narrator of all the planets in our solar system, none can support complex life except earth. But the conditions on earth were not always so suitable for life, and scientists are working to reconstruct the history of two essential requirements whicmake tlanet hatable. The first is free oxygen in the atmosphere. The other is a moderate and stable climate. Paleontologist andy knoll has spent much of his career examining earths rock record to piece together the history of early life and the rise of oxygen. Theres this close waltz, if you wil...

The other is a moderate and stable climate. Paleontologist andy knoll has spent much of his career examining earths rock record to piece together the history of early life and the rise of oxygen. Theres this close waltz if you will, between the history of earths physical environments and the history of life. Narrator geologist paul hoffman studies the time in our planets history when the climate was much more extreme, a period called the snowball earth. Hoffman during the maximum cold of the snowball earth, you have an earth thats more like mars than it is like earth. Narrator hoffman is seeki...

Funding for this program is provided by annenberg media. Narrator of all the planets in our solar system, none can support complex life except earth. But the conditions on earth we re not always so suitable for life, and scientists are working to reconstruct the history of two essential requirements whmake tlanet hatable. The first is free oxygen in the atmosphere. The other is a moderate and stable climate. Paleontologist andy knoll has spent much of his career examining earths rock record to piece together the history of early life and the rise of oxygen. Theres this close waltz if you will,...

We inaudible rise to hostile crowds where barricades are being broken, vehicles broken and buses taken over, things lit on fire. Talking large destruction of property. I think if we say that mass scalewe saw what happened in the nation capital with barricades and destruction of property so i get it so maybe this requires language tweaking. Then, thei think this gets me pretty much maybe through it. The restocking at 10 million which happens to be the section 9. 118 threshold where you have to come anyway, we need to discuss that. And then i think ab481 specifically does require and i put the l...

To piece together the history of early life and the rise of oxygen. Theres this close waltz, if you will, between the history of earths physical environments and the history of life. Narrator geologist paul hoffman studies the time in our planets history when the climate was much more extreme, a period called the snowball earth. Hoffman during the maximum cold of the snowball earth, you have an earth thats more like mars than it is like earth. Narrator hoffman is seeking answers to how the earth entered this snowball and, more important for us, how it returned to warmer conditions and has main...