First alien signal may have been detected...!

[Urban Ranger]

Originally posted by Jarouik
Well, not always. Actually the real survivors on Earth are bacteria and after that, insects. More complex species come and go, depending on the environment and local conditions.

Since bacteria have different strains and insects have different species, you can't just lump them in one big group.

Originally posted by Jarouik
I wouldn't say that e.g. mammals have an advantage over bacteria, even if they are complex... surely bacteria will persist longer. Complex organisms only exist if the conditions and environment are right, but the simple ones are always there.

Again, yes and no. Even the simplest lifeforms must depends on the existence of proper conditions.

Originally posted by Jarouik
Hmm... nothing in the world is perfect.

That's because all organisms are evolved.

Originally posted by Jarouik
I wouldn't call everything in the world "flawed" just because it isn't the hypothetical "perfect" means of achieving a given goal... Mainly this is because there are no goals in nature, and the word "flawed" only enters into it if we invent some perfect state or goal that we think species should approach.

Even if this is the case, there are still obvious flaws. For example, the layer of blood vessels in the human eye is right in front of the light sensitive cells, obstructing the functionality of the eye. This is clearly flawed.