A Couple of Things.
What makes me believe there is more out there?
Parts of our history we cannot explain.
How did the Mayans cut so precisely with the tools they had?
How did the Egyptians build the pyramids in a precise alignment to the stars?
Why do perspective paintings show aircrafts not of that century? Before the dawn of television and CGI?
Where did the immortal jellyfish come from?
Magic? Or something greater?