Welcome to Astronomy & Telescope Astronomy

 
 

  Modules

· Home
· AvantGo
· Content
· Downloads
· Encyclopedia
· FAQ
· Feedback
· Forums
· Journal
· Members List
· Private Messages
· Recommend Us
· Reviews
· Search
· Statistics
· Stories Archive
· Submit News
· Surveys
· Top 10
· Topics
· Web Links
· Your Account
 

  Who's Online

There are currently, 5 guest(s) and 0 member(s) that are online.

You are Anonymous user. You can register for free by clicking here
 

  Search



 

  Languages

Select Interface Language:

 

  Random Headlines


Observatory
[ Observatory ]

·Astronomy: Observatory - WHERE IN THE WORLD
 

 
  Earth: Astronomy: Earth - THE ORIGIN OF LIFE ON EARTH
Posted on Thursday, December 02 @ 14:09:32 CST by astronomy
 
 
  Earth

THE ORIGIN OF LIFE ON EARTH

No o ne has yet figured out exactly how Earth passed from a state of having all the chemical building blocks necessary for life to a state where life actually existed. But the change, while enormously important, may not have been all that much of a leap.



Oldest rocks in the world are about 3.9 billion years old, and ones showing fossil traces of life are barely younger. This suggests (rather unlikely), or it
arose even earlier. In any case, the date is it important bevause at that time .the Solar System was still a pretty hostile place. Large, devastating, impacts by asteroids and comets were frequent, and Earth's surface looked more like the Moon's southern highlands than like any landscape on Earth today.

From what we know about today's Earth, life is outstandingly tenacious, adaptable, and resourceful. Given this tenacity, it is possible that life actually started on Earth several times, but was wiped out by impacts on each attempt but the last.

What does this say for the chances of finding life else-fey where, either in the Solar System or outside it? Actually, the chances look fairly good. Astrophysics shows that chemistry . is chemistry the universe over, so nature ought to be able to duplicate in another place the pathway that led to life on Earth. But whether life can persist elsewhere, and for how long, we can only guess..

 
 
  Login

Nickname

Password

Don't have an account yet? You can create one. As a registered user you have some advantages like theme manager, comments configuration and post comments with your name.
 

  Related Links

· More about Earth
· News by astronomy


Most read story about Earth:
Astronomy: Earth

 

  Article Rating

Average Score: 0
Votes: 0

Please take a second and vote for this article:

Excellent
Very Good
Good
Regular
Bad

 

  Options


 Printer Friendly Printer Friendly

 Send to a Friend Send to a Friend

 

 
 
Associated Topics

Earth
 
 


 
 
"Login" | Login/Create an Account | 0 comments
The comments are owned by the poster. We aren't responsible for their content.
 
 


 
 
No Comments Allowed for Anonymous, please register
 
 


 
  Astronomy & Telescope Astronomy

All logos and trademarks in this site are property of their respective owner. The comments are property of their posters, all the rest © 2004 by Astronomy & Telescope Astronomy
You can syndicate our news using the file backend.php or ultramode.txt