Funny how UFO—in the extraterrestrial sense—sightings have basically gone the way of Bigfoot sightings and the Loch Ness Monster sightings since the advent of the smartphone.
Now, do I think there's other life out there? Undoubtedly, maybe even on Mars, Europa, or Titan just in our solar system. Do I think there's intelligent life elsewhere in the universe? Yes. However, I don't believe our ancestors were visited by aliens. Space is too f***ing huge—like mind-boggling massive.
But, like Jedi said, UFO sightings are probably just classified man-made objects being tested.