maybe, maybe not. but the odds that we humans will ever run into extraterrestrial life are slim. take into account the number of stars in our galaxy alone, compound that with how few of them have planets, compound that with how few of those planets would be suitable for life, compound that with the off chance that life sparked into existance on one of those planets, then take into account that even if life did exist on another panet the odds of their timeline lining up with our own are astronomical. so.... they might exist, but i doubt we'll ever run into any.