Lets Put Things Into Perspective
There is an estimated 500 billion galaxies in 1 Universe. Each Galaxy can have less or more then 100 Billion stars, each star has 50% chance as of now to have planets orbiting it.
Kepler telescope found estimated 500 million planets in 2 years that could hold life in one galaxy, plus we know about 1 that already does. So if 500 billion galaxies have 500 million planets out of which 1 hosts intelligent life we have about 500 BILLION CIVILISATIONS in ONE Universe!

Still think we are alone?

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