DNA is a collection of chemicals basically, which was most likely not the starting point of life! DNA will not just create itself, this process happens inside the cell. At some point in the distant past a collection of chemicals must have came together in a basic configutration to have eventually led to basic life and ultimately us.

As for travelling to the nearest star other than our sun, this is not possible yet, and as far as physics as we understand it it would take infinite ammounts of energy to accelerate an object to the speed of light which is the kind of speed required to reach distant stars in any reasonable ammount of time.

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