As l think space is infinite and therefore has infinity possibilities regarding life on other planets, I've also often thought that if we ever get to come into contact with another life form, they may look like some of the creatures that have evolved on our own planet, that look really strange compared to even the strangest looking human.
Three examples are above. The top one is a human head louse on a strand of hair, the middle one is a mosquito, and the bottom one a fly.
Just think of how quickly a fly reacts as you try to swat it. One day their larger space travelling relatives may be our masters (and l bet they will be pissed off).
You have been warned.