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Again, I thoroughly enjoyed this week’s lab. I really like working with the microscope—it’s so amazing that there is another invisible world moving around, under and through us all the time. It is also amazing that these invisible things change and react just as we do. I loved watching the cells swell and deflate as we removed and added the sodium solution—it was fascinating to see what a calculated impact we were able to have on them.

I also found class this week very interesting, especially on Friday. It is mind boggling to think that 99% of life has gone extinct, and that humans, in all likelihood, will suffer the same fate. What then are the organisms that are still around? Is it just prokaryotes that have survived throughout the ages? If so, why? It seems as though the more complex an organism is, the more difficult a time it has surviving. I suppose that would make sense, seeing as how more complex organisms depend on more things. I wonder what would have happened had that meteorite never hit earth…would humans still have evolved?