What is the significance of NASA's Feb 22, 2017 announcement? We define life itself based upon our limited observation of it on our planet, Earth. All we really know about life is based upon observations of the life that formed on the planet Earth. From those observations, we conclude that life involves carbon and life requires water. Today, a discovery of another solar system with between three and seven planets that may well be suitable for life.

Source: Forbes February 22, 2017 20:37 UTC