Despite the lack of evidence to support the existence of extraterrestrial intelligence, many people firmly believe in it. If you are skeptical on this matter you are likely to be accused of being arrogant, anthropocentric or even a religious fanatic. However, to consider the possibility that we might be alone in the universe doesn’t necessarily make you any of those things. You can believe both that humans are rare or unique and at the same time that they are a purposeless arrangement of matter or a curious accident in space-time.
In 1961 the astronomer Frank Drake announced that the number of extraterrestrial civilizations in our galaxy that might contact us could be calculated with the following equation:
N = R … Read the rest