Aliens (and the answer is "yes!")

"We may be entering a new Era in physics. An Era where there are weird features in the universe that we cannot explain. An Era where we have hints that we live in a multiverse that lies frustratingly beyond our reach. An Era where we will never be able to answer the question why is there something rather than nothing."

http://www.businessinsider.com/the-end-of-physics-as-we-know-it-2016-1