Nasa made a discovery in 2016, and found 2 habitable planets in the system Trappist-1! Later this number incerased to 7! You guys have to check this out.
LINK
Research proves, that some of these planets have LIQUID WATER on their surfaces, and three of them are orbiting their star's HABITABLE ZONE.

And before you say, yes i know most of you found this out before if you checked google, but i felt like i had to share this with you guys. This is one step towards the insurance of humankind's future. And one hell of a mind blowing discovery.