U.S. CitiesCity-Data Forum Index
Go Back   City-Data Forum > General Forums > Unexplained Mysteries and Paranormal
 [Register]
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
 
Old 05-19-2018, 02:48 PM
Status: "Greenville SC Bound" (set 4 days ago)
 
Location: Naperville, Illinois
3,922 posts, read 3,147,042 times
Reputation: 7162

Advertisements

Evolutionary biology has gone from thinking life will arise on any planet with the right conditions, to the realization that life's arising out of nonlife is likely a very rare occurrence. This paper suggests life may have originated once in our galaxy and spread by interstellar comets and asteroids carrying genetic material to all of its corners over billions of years.

What this would mean is that all life in the galaxy is interrelated, and if we find life on Mars, Enceladus, Titan, Galileo, etc. we will find that they're our cousins rather than something totally alien. It also means as suggested in the following quote that we will find the forms and natural selection of life elsewhere will not be so alien that we won't recognize it as life.

Of particular interest to the readers of this group is the suggestion that phenomena like the Cambrian Explosion and the sudden emergence of octopod intelligence may be the result of genetic material coming into the Earth's biosphere from elsewhere in the galaxy. Cue theme from Ridley Scott's Prometheus.

Quote:
...With the rapidly increasing number of exoplanets that have been discovered in the habitable zones of long-lived red dwarf stars (Gillon et al., 2016), the prospects for genetic exchanges between life-bearing Earth-like planets cannot be ignored. In our view the idea of life emerging de novo in multiple locations through a process of in situ abiogenesis appears far-fetched and merely compounds the difficulty of a single origination on the Earth. The internal evidence from terrestrial biology that we have discussed in this paper suggests that the entire ensemble of habitable planets in the galaxy constitutes a single interconnected biosphere. Lifeforms elsewhere, on this viewpoint, will be expected to exhibit a converging pattern of genotypes and phenotypes, subject to natural selection (Darwinian and Lamarckian) within individual planetary habitats. ...
Source:

https://www.sciencedirect.com/scienc...79610718300798
Reply With Quote Quick reply to this message

Reply
Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply
Message:

Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > General Forums > Unexplained Mysteries and Paranormal
Follow City-Data.com founder on our Forum or

All times are GMT -6.

2005-2017, Advameg, Inc.

City-Data.com - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 - Top