Rocks.
Everywhere you look, you see rocks.
And gas.
Lots and lots of gas and rocks.
The likelihood of alien life in the universe has decreased dramatically in the past hundred years. A hundred years ago, the possibility of moon men was considered to be realistic. Then we got obsessed about Martians until we landed probes there and found...just red sand and rocks. Oh, and NO canals. Then we figured SETI would detect intelligent life in the universe. So far...a big NOTHING.