One of my best friends told me he thinks its silly to believe in space aliens. For some reason it kinda shocked me to encounter this attitude; I guess I'm used to living in a world of believers. But I'm sure a lot of people agree with him. I don't. Here's why.
Over and within the past four hundred years most humans have come to understand the universe as a three dimensional vastnes, with many stars, and eight or nine planets, among which is earth. It has always been assumed that if life existed elsewhere, it would be on other planets. So the huge question always was: are there any extra-solar planets, and how many, and how many earthlike, in the universe?
Over the past fifteen years, from the mid nineties till now, the answer is becoming evident: not only is the universe full of planets, but there are many earthlike planets out there. We are seeing them with our newest and best telescopes; earthlike planets orbiting other stars. It might once have been silly to belive in space aliens. It no longer is. In fact, as each day passes, it becomes sillier and sillier not to.
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