QotD: Extraterrestrial

Do you believe there is intelligent life on other planets?

I believe there is a possibility, but I think the odds of intelligent life on any two planets meeting are almost nil.  Many people point out there are endless stars, and possibly endless planets among those stars, of which a small percentage may exhibit conditions that support life, but they do not take into account the vastness of time.  The idea that two civilizations develop spacefaring technologies at the same time to facilitate a mutual peaceful exchange in this universe is silly to consider.  Would the two food-pyramid kings of their respective planets be able to coexist, or would we need to establish superiority?  Economy also seems to put a damper on interplanetary travel and exploration; why leave the planet, when the alternatives are so inhospitable and travel is so expensive?  How would we treat progeny that grow up in the weak gravity of other planets, grandchildren who would be crushed by earth's gravity?  I'm staying put, and I hope the intelligent life--if there is any--stays put as well.