Questions about example sentences with, and the definition and usage of "Smithsonian"

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Q: At Smithsonian Natural History Museum, Richard Barkley, an archeologist have been researching how the atmosphere was like in ancient times on the earth.

One of the things that he can rely on is, surprisingly, fossils of gingko leaf.

As it hasn’t changed its shape and structure since the Cretaceous period, he can see the differences between leaves from different periods.

In order to determine the component of the atmosphere in an ancient era, he has been investigating the number of pores of gingko leaves. Since plants respire through the pores on the surface, the number is highly related to the level of carbon in the air.

In the late Cretaceous period, there was an era called “hothouse” period, the atmosphere contained much more carbon than now.

Since the global warming has been a big issue, he’s working on creating the atmosphere in the era to speculate what the air will be like in the near future.

soa natural?

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