article_snippet.sent: (CNN)Are we alone in the cosmos?
article_snippet.sent: Or might there be intelligent life elsewhere?
article_snippet.sent: That suggests that rocky planets with liquid water on That surfaces might also have developed primitive forms of life.
article_snippet.sent: Life as we know Life is carbon-based and requires liquid water.
article_snippet.sent: Probably the most likely form of life on exoplanets is far more primitive.
article_snippet.sent: Astronomers have found signatures of organic molecules, the building blocks of life, in the interstellar material that permeates the space between stars in our galaxy.
article_snippet.sent: Possible signatures of living organisms on distant exoplanets include an oxygen-rich atmosphere, such as that created by the first bacteria on Earth, or perhaps methane or carbon dioxide.
article_snippet.sent: Life elsewhere in the universe, and even elsewhere in our own Milky Way galaxy, is practically inevitable.
article_snippet.sent: Signs of life on exoplanets orbiting nearby stars will probably be discovered in the coming decades with advanced telescopes.
highlights_snippet.sent: Meg Urry: Life elsewhere in the universe, and even elsewhere in our own Milky Way galaxy, is practically inevitable .
  