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Mountains have been built and eroded, continents and oceans have moved great distances, and the Earth has fluctuated from being extremely cold and almost completely covered with ice to being very warm and ice-free.
Along the way, we'll learn how stratigraphic succession and radioactive decay contribute to the work of paleontologists.
But it takes a team of engineers to keep things running, doing everything from cleaning out bird feathers to checking for broken lights.
The race to the edge, part 3: Where a fast food restaurant chain that can't always reach the cloud because its city is surrounded by a rain forest finds a way to move its data center into something like a refrigerator.
Paul says he can tell from the fossils that superus awesomus lived on Earth about 175 million years ago.
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