Liked on YouTube: Are We Alone? | How the Universe Works

Are We Alone? | How the Universe Works
There are billions of stars in our galaxy, with billions of planets circling them. But, as far as we know, only one planet has life: Earth. But are we really alone? Stream Full Episodes of How the Universe Works: https://ift.tt/39qtDm3 Subscribe to Science Channel: http://bit.ly/SubscribeScience Like us on Facebook: https://ift.tt/1lo5M67 Follow us on Twitter: https://twitter.com/ScienceChannel Follow us on Instagram: https://ift.tt/2P66OuK
via YouTube https://www.youtube.com/watch?v=eQkSt050pl8