Earth's Cousin Find 'Whispers The Possibility That We Are Not Alone' | Video

And ‘how much longer until a new discovery shouts it out?’ asks the Science @ NASA video series. In July 2014, NASA announced the discovery of Kepler 452b , a planet slightly larger than Earth that resides in the habitable zone of its solar system. It is 6 billion+ years old, (older than Earth) allowing for plenty of time for life to develop.