Computer viruses are alive.
To my mathematical brain, the numbers alone make thinking about aliens perfectly rational.
The beatings will continue until morale improves.
The wise never marry, and when they marry they become otherwise.
The usual approach of science of constructing a mathematical model cannot answer the questions of why there should be a universe for the model to describe. Why does the universe go to all the bother of existing?
A zero-gravity flight is a first step toward space travel.