The cosmic calendar compresses the local history of the universe into a single year. If the universe began on January 1st it was not until May that the Milky Way formed. Other planetary systems may have appeared in June, July and August, but our Sun and Earth not until mid-September. Life arose soon after. We humans appear on the cosmic calendar so recently that our recorded history occupies only the last few seconds of the last minute of December 31st.
Carl SaganOne of the saddest lessons of history is this: If weโve been bamboozled long enough, we tend to reject any evidence of the bamboozle. Weโre no longer interested in finding out the truth. The bamboozle has captured us. Itโs simply too painful to acknowledge, even to ourselves, that weโve been taken. Once you give a charlatan power over you, you almost never get it back.
Carl SaganIn college, in the early 1950s, I began to learn a little about how science works, the secrets of its great success, how rigorous the standards of evidence must be if we are really to know something is true, how many false starts and dead ends have plagued human thinking, how our biases can colour our interpretation of evidence, and how often belief systems widely held and supported by the political, religious and academic hierarchies turn out to be not just slightly in error, but grotesquely wrong.
Carl SaganIf the constellations had been named in the twentieth century, I suppose we would see bicycles and refrigerators in the sky.
Carl Sagan