http://truthufo.blogspot.com/: What are the possible evolution of life on a planet similar to Earth

Friday, 22 August 2008

What are the possible evolution of life on a planet similar to Earth

According to astronomers British Open University, One billion planets like Earth, capable of hosting life could exist in our galaxy [see article].

Some intelligent beings are the product of billions of years of biological evolution. (Approximately 3.5 billion years on Earth: the first micro-organisms until today)

A general problem for the idea that we are making life elsewhere.
We have only one kind of life to study, all agencies landowners derive from the same origin. And neither the scientist nor the profane can not decide which properties of earthly life are evolutionary accidents at trial, and what properties are a common life where it starts.
The belief that life elsewhere must be like life here is what Carl Sagan appellait chauvinism.

The extraterrestrial equivalent of man can it or should it be similar to us physically?
This is an excellent question and to respond clearly, we will take as a premise that the life has developed a technology and is on a planet "similar" to the Earth. The answer (not categorical) is done in several points:
-- There is a great universal physical laws governing the matter and processes which are transforming, are changing ...
-- The basic chemical elements of life become very abundant in the universe: it is therefore reasonable to assume that it would be a life based on carbon
-- A life "advanced" seems necessarily linked to the physical complexity of the individual: therefore be a multicellular
-- Life in a gaseous environment facilitates the development of a technology (fire, so cooking), unlike a life under water (which also suffered heavy pressure) or in a solid environment
-- The need to be given meaning to apprehend its environment: sense touch, smell, hearing, visual or their equivalents
-- These beings must be able to act on their environment to develop a technology therefore have the bodies of manipulation
-- To handle the data they receive, they need a brain or its equivalent
-- They must also communicate with each other by organs of transmission and reception of signals, whether audio, visual, tactile or olfactory
-- The locomotion beings makes it easier to develop a technology therefore have the bodies of locomotion
-- The eyes or sensory organs essential these beings would be near the body signal processing (equivalent to the brain) to enable a rapid response to stimuli
-- As the sense they are not necessarily the same, and their bodies visual (if they have) could react to different wavelengths, depending on the conditions under which they have evolved.
It can therefore be expected, given the current state of our knowledge, to be located opposite beings and not like us, but having a physical configuration fairly close to what we know on Earth.