Can anyone imagine how life could be for a species that had the luck to have another habitable planet within its own star system?

Imagine that Mars had been a little bigger and it was literally a sister planet Earth.

In the postulation that the planet be inert but with water on its surface, could be rapidly colonized with the technology available from the 60’s. Humans have sent probes to colonize the planet, sending seeds making a garden fit for human life in just a few decades.

In other cases, though the postulation that the planet has flora and animal life but not intelligent life, we would have an ethical dilemma about whether it would interfere with proper development of the planet, but imagine the possibilities that would open to completely different species have not evolved as terrestrial species that could be brought to earth to exploit for commercial purposes or simply as one might imagine at medical research and pharmacy from the plants and animals that exist there.

Medicine and pharmacy available today has been obtained almost entirely from the study of terrestrial plant and animal species.

For commercial purposes, we would live something similar to what happened in the Middle Ages when the Spanish conquerors brought the potato to Europe, maize, tobacco or cocoa, which allowed an improved standard of living of Europeans, since the potato and maize adapted well to weather and could feed millions of Europeans, which in turn boosted the economic development of later centuries.

Also, plant and animal life had organic resourced to Mars, which would have coal and oil, which would make their exploration more interesting for companies. How many plant and animal species will be along the endless planets of the infinite universe that could be very useful to us? What type of hydrocarbons could arise under different planetary conditions? It seems that human knowledge has come to know the composition of almost all ordinary matter (only 5% of the universe), and that 21% is dark matter (the name itself says, dark because it is unknown), and 72 % is more rare, dark energy

How many DNA combinations that we’re missing? what might be considered biological material, another different and higher level of ordinary matter. If within the same planet, our Earth, we have a great biodiversity, with plants and animals radically different from one continent to another only separated by a few thousands or millions of years, there will be over a Galaxy? What a supercluster?

In an upper course, imagine finally that Mars was a planet inhabited by another civilization of intelligent beings. Can you imagine what skills would have developed along separate centuries of history? And how fruitful it could be a sort of global commerce with another civilization? Working two or more civilizations originate in one system synergies and economies of scale that they would advance and progress much more quickly.

We have little more than a decade to find planets in nearby stars, and we have found a system where more than one planet in the habitable zone, Gliese 581

Can you imagine three different civilizations exploiting the resources of a system?

Can a single species in a star system evolve to the level II Scale Kardashev without synergies and economies of scale without collaboration with other planetary neighbors?

This discussion also does not fit into other considerations, such as the sense of species, species nationalism, which would create a race the existence of a neighbor, and to eliminate internal stresses. Can you imagine all of humanity to cooperate, without tensions or war?

Just think about looking to this graph