Following is from the email I sent to my supervisor after I finished reading this book:
In the past few days, I have finished reading Cosmology by Edward Harrison. This terrific book greatly broadened my horizons.
Also, I got an clear overview of the cosmology field nowadays. I think, the cosmology research has encountered bottlenecks now, just as George Ellis said “We are unable to obtain a model of the universe without some specifically cosmological assumptions that are completely unverifiable”(“Cosmology and verifiability” , 1975). So sometimes we cannot definitely say the direction that we are in is right. Maybe it takes us a very long time before we find what we are doing is meaningless. Or, what we are doing can never be proved or disproved. The situation is just like what Particle Physics experienced in the last decades of 20th century.
Maybe what I am to say next is a little crazy, but I think it is a serious and important topic.
The last chapter of Edward’s cosmology “Life in the Universe” aroused my interest deeply. In fact I think the Fermi Paradox is a key to a new field, which we can combine Sociology, Ethology, Psychology together. I have some knowledge in these fields, and my next plan is to read The Self-Organizing Universe by Erich Jantsch.