Looking for extraterrestrial life is akin to a search for a cosmic needle-in-a-haystack, as evidenced by the above incredible Hubble Space Telescope image showing approximately 10,000 galaxies.
In large part, thanks to NASA's Kepler spacecraft, more than 1,400 planets have been identified beyond Earth.
A few days ago, NASA tried closing the gap between life on Earth and the possibilities of life elsewhere. The space agency and the Library of Congress (image below left) brought together scientists, historians, philosophers and theologians from around the world for a two-day symposium, "Preparing For Discovery." Their agenda: To explore how we prepare for the inevitable discovery of extraterrestrial life, be it simple microbial organisms or intelligent beings.