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Is joining me. You used to cover baltimore. What can you tell us about the neighborhood . Is it a neighborhood tense with the police before in the past . It is one of the regions in baltimore where sometimes there is Police Activity and not. Its northwest from where most people know the downtown area. It is very close to the zoo. Its directly across the street from coppen state university. It is across the street from Frederick Douglass high school a Public High School there. The chopper working for us reported that instead of getting out of school like they normally do and going to the public...

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,...

1970. So they subsisted by drawing on each other. The book is more than a study of just how david started by one tribe. It is also a personal story about women and family relationships. It is about women in leadership, about building communities, about trying to save an indigenous colter on the brink of being lost and about making sacrifices for others. I would say that what they did was heroic and they say they were just trying to do it for the sake of taking care of the kids and the elders of the community. Alma was the educator of the tribe. At that time i was assistant director of our new ...

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...

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 seeking answers to how the earth entered this snowball and, more important for us how it returned to war...