EARTHSC 1100 Lecture 12: Lecture 12
17 Feb 2018
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Document Summary
Nitrogen makes up most of our atmosphere, and if you cool it down enough it turns into this weird liquid that steams. There appears to be a frozen, former lake of liquid nitrogen, located in a mountain range just north of pluto"s informally named sputnik planum. Photo of earth 250 million years from now. The atlantic ocean looks more like the big salt lake. Plate tectonics have been around for about 50 years, though it"s accepted as scienti c fact. Remember steady state, universe constant, vs big bang with the universe constantly changing. For a long time, it was accepted that earth didn"t change either. Columbus, ohio used to be in the southern hemisphere. National park, there"s evidence of an ancient ocean. Wrote the origins of oceans and continents in 1915. This was pretty much the equivalent of galileo"s book. He suggested land masses slowly move (continental drift)
