So how can we test the idea that the transition from nonlife to life is simple enough to happen repeatedly? The most obvious and straightforward way is to search for a second form of life on Earth. No planet is more Earth-like than Earth itself, so if the path to life is easy, then life should have started up many times over right here.
Interpretation
The quote suggests that if life can easily arise from nonlife, we should find multiple forms of life on Earth.
In this quote, Paul Davies poses a thought-provoking question about the origins of life, suggesting that if the transition from nonlife to life is indeed straightforward, we should expect to find more than one instance of life emerging on Earth. He implies that our understanding of life's origins is still limited and that exploring this idea could lead to significant discoveries about the nature of life itself.
In practice
In a lecture about astrobiology, a speaker could use this quote to highlight the search for extraterrestrial life.
The temptation to believe that the Universe is the product of some sort of design, a manifestation of subtle aesthetic and mathematical judgment, is overwhelming. The belief that there is "something behind it all" is one that I personally share with, I suspect, a majority of physicists.
Science, we are repeatedly told, is the most reliable form of knowledge about the world because it is based on testable hypotheses. Religion, by contrast, is based on faith. The term 'doubting Thomas' well illustrates the difference.
Although the elusive 'cure' may be a distant dream, understanding the true nature of cancer will enable it to be better controlled and less menacing.
Many investigators feel uneasy stating in public that the origin of life is a mystery, even though behind closed doors they admit they are baffled.
Traditionally, scientists have treated the laws of physics as simply 'given,' elegant mathematical relationships that were somehow imprinted on the universe at its birth, and fixed thereafter. Inquiry into the origin and nature of the laws was not regarded as a proper part of science.
For me, science is already fantastical enough. Unlocking the secrets of nature with fundamental physics or cosmology or astrobiology leads you into a wonderland compared with which beliefs in things like alien abductions pale into insignificance.
I'm on a crusade to get movie directors to get their science right because, more often than they believe, the science is more extraordinary than anything they can invent.
Reply when questioned on the safety of the polio vaccine he developed: It is safe, and you can't get safer than safe.
By venturing into space, we improve life for everyone here on Earth - scientific advances and innovations that come from this kind of research create products we use in our daily lives.
My expertise is the space program and what it should be in the future based on my experience of looking at the transitions that we've made between pre-Sputnik days and getting to the moon.
Has there ever been a religion with the prophetic accuracy and reliability of science? . . . No other human institution comes close.
Civilization begins with distillation
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