Origin of Life, Integrated Writing, Test 6, Barron

In the article, the author primarily talks about the experiment which aimed to discover the origin of life on Earth. However, the speaker casts doubt on the correctness of the experiment and cites several scientists' critiques towards that experiment done several years ago.

In the first place, the speaker of the lecture confirms that the experiment was grand at that time. Nevertheless, the speaker also points out that the electrical problem with the experiment. The author of the article writes that, in laboratory environment, flasks are charged with electricity continuously. But, according to the speaker, though there were frequent electrical storms in early atmosphere of Earth, there was no continuous electricity, which is certainly a flaw of that experiment.

In the second place, in the article, the author mentions that oxygen is reduced in experiment. According to the speaker, this is another flaw as well. The speaker of the lecture says that the premise that there was not considerable oxygen in atmosphere of early Earth cannot be proved anyway. Perhaps that hypothesis is totally wrong, which would undermine the correctness of the experiment.

Finally, the speaker also mentions meteorites as evidence to disprove the conclusion of the experiment in the article. The speaker says that scientists have found that there is amino acid in meteorites, which would demonstrate that this kind of acid could survive under severe conditions. This conclusion means, according to what the speaker says, that the acid was on early Earth which contained asteroids. Moreover, the speaker also points out that we just don't know or unsure about the truth that how life in Earth originated from simple organs into large buildings. There are more work before we make clear.