How would you go about terra forming another planet? Well you could send microbes to start organic life. Of course it will take 4 billion years to do it judging from our knowledge of our planet.
What if we could send microbes to terra form another planet by sending them on light beams or the DNA or RNA components to make bacteria on sequences on a light beam? What if we sent this light beam back through time? Anyway if you figured out what was on a planet you could in fact terra form it in the past by sending these microbes back in time (4 billion years) and then they would grow and eat themselves to death, but start all sorts of life, then die and be buried over a billion years, turn into oil and then when you get there, you have plant life, oil reserves and humidity, meaning water, atmosphere and abundance of life.
We have found in lakes in California an extremophile microbe thriving in arsenic saturated mud on Earth. They eat the arsenic and can’t live without it. Doesn’t this kind of point to life on other planets, as it seems to survive everywhere on Earth right? Well, of course, absolutely, glad to see you are not in denial like all the religious fundamentalist radicals, who are often very close-minded. There is no doubt that there is every type of life you can imagine including the one in which a whole planet alive, perhaps a giant dead collapsed sun, or a giant planet over ridden by life. Why not, with all the trillions of places, surely it exists. Some here, some there, some everywhere, some we do not have here, exists elsewhere, some of what is there, may exist here also.
The Universe and everything in it has life and it is everywhere. There is life on Mars, Venus, Pluto and Alpha Centari, you name it, there are different types of life everywhere. And our actions can cause life or kill life on other planets, modify their eco-systems or end up destroying them, so we need to pay attention and proceed with caution, but we should not eliminate our possibilities, without knowing the technologies, which we will soon possess in the near future. Think on this.