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Practice Listening: Fill in the Blanks (Type In)
ID: #33696
Short
Corals
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The way I look back in the past is by using the fossilized remains of corals. You can see an image of one of these corals behind me. It was collected from close to , thousands of meters below the sea, so, very different than the kinds of corals you may have been enough to see if you've had a tropical holiday. So I'm hoping that this talk will give you a four-dimensional view of the . Two dimensions, such as this beautiful two-dimensional image of the sea surface . This was taken using satellite, so it's got spatial resolution. The overall features are easy to understand. The equatorial regions are warm because there's more sunlight. The polar regions are cold because there's less sunlight. And that allows big to build up on Antarctica and up in the Northern Hemisphere.
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