Earth-like planets, dozens of it! ...and people just like us.?

Question

What do you think would happen if we ever find dozens of Earth-like planets, and there's people just like us and even a more super-advanced civilization and some that are able to do things we could never do or believe we could.

I believe sometimes we just imagine stuff, that's why it is called inmagination, but if you think about it, an imagination could be a fact, a truth somewhere beyond our expectations, it could exist somewhere else just like we do here on the planet earth.

This is just my thoughts, and thought I would share them, have you ever thought about something similar to this? If so, please share it. Thanks!

Answer 1

well they have already found large earth-like planets. so i think its really possible that there has to be other life forms out there suited to live in conditions like we do. even life forms that can live on other planets that r nothing like earth. i mean, the universe is so big and there r so many galaxies and planets and suns and solar systems, its stupid to think that our planet holds the only life that there ever was.

Answer 2

Earth like planets, yes. There is nothing abnormal about it. But the rest is a bit fast going. We have to look what is likely, common and highly probable from what is very very unlikely.

1/ Apparition of life seems to be a pretty straight forward event and is not a big deal. Evolution is a intrisic phenomena with life. However, it is totally possible to imagine a planet like earth without life at all or with life restricted to RNA.

2/ The oxygen atmosphere has conditionned a big part of the evolution of multicellular beings on earth. This oxygen might be a simple luck. Originally, the atmosphere of the earth was not oxygen but it changed gradually. It was first containing mainly helium and hydrogen then it shifted to a second atmosphere of CO2, ammonia and steam. This leads to a 3rd atmosphere containing nitrogen, maybe hydrogen though it is disputed, CO2 and steam. The CO2 was later transformed in organic matter by bacteria which released oxygen and made the atmosphere what it is. Imagine the most prevalent bacteria has been releasing ammonia or methan instead of oxygen, we will have had another atmosphere.

3/ The shift from procaryotes to eucaryots organism i.e. from bacteria to 'advanced life forms" is very hazardous event and it probably occured only once. We, and all the other 'advanced form of life', from cats to amobea passing to trees and fungi, are a colony of bacteria. Each of our cell is an "advanced" bacteria which hates oxygen living in symbiosis with another type of bacteria which loves oxygen (the mitochondriae inside our cells). Plants are living in symbiosis with a bacteria that eats CO2 and released oxygen. This event is a very low probability event. It was triggered by the bacteria releasing oxygen which poisonned the atmosphere and leads to evolution. Our cells to survive had to 'ally' with oxygen friendly bacteria and protect their kernel by a membrane from contamination. The plants went a step further and incorporated the dreadful bacteria to feed themselves. If there are life on other planets, which I do not doubt too much, it is very unlikely it has moved out of bacteria level.

4/ The grouping of one cell in a colony seems to be a common thing and has been 'invented' by life in many occasion independantly. Same as the polarity (head/tail or top/root). But the evolution from a worm like creature to a human like creature is very unlikely as well. There are millions of other possibilities.

5/ In addition, thinking that intelligence is a must in evolution might be a bit presomptuous. Each species has usually a duration of around 10 millions years. Human species (not homo sapiens but homo) has been there for the last 2 millions years. It is far from obvious it will last up to 10 millions. The predominant life forms on this earth are the bacteria first, the worms-like creature second, the insect third. Intelligent primates are an accident and the best proof is that apes, our second most intelligent cousins, have not flourished but stayed in limited niches in the forest.

6/ Finally, I am very happy we never met advanced civilizations from space. When life meets another life forms and has the possibility to destroy it, it will. Ants will destroy other ants. The nearest cousins and second most intelligent animal on this earth, the chimps have been massacred by humans, eaten, their hands cut as trophy, their brain ausculted alive and they are still injected HIV virus. The less advanced civilization on earth, the Tasmanians, were massacred by european in less than 100 years. A super advanced civilization will probably see us just the way we see a termite or a ant nest.

7/ Finally, a super advanced civilization might choose another path than technology.

Let us be happy and listen quietly to the silence of space.

Answer 3

I thought it was entirely possible myself. Some day, we will not be alone. And that will be the most, deciding? day? IDK. It will be a day to remember though.