Plant Sciences, Zoology & Evolution / Re: If we canít replicate life in a lab, how could it happen randomly?« on: 17/02/2020 17:12:06 »
Why did life only generate once? We don't see new life crawling around the tidal pools.
Why does life have only one manner of replication? Is DNA the only answer?
As Alan said, how do we know it only happened once?
Also, I would dispute the idea of tide pools as likely candidates for abiogenesis locations. The life teeming around black smokers on the ocean floor indicates favorable conditions for life--and we are fairly sure that the environment around these vents is not very different now than it was billions of years ago (stable temp, pressure, alkalinity, salinity etc. etc.). Compare to tidal pools, which have experienced so many different climates (and occur in all sorts of rock), that it is unlikely that they would reproduce any of the chemistry that was applicable 3.5 billion years ago. Also, it appears that black smoker type vents are present and active on both Enceladus and Europa, increasing the number of potential places in the solar system that life could develop (or could have developed).