Mankind have such a deep stake in inward illumination, that there is much to be said by the hermit or monk in defence of his life of thought and prayer. — Ralph Waldo Emerson Copy Share Image
It's time to commit to finding the answer, to search for life beyond Earth. Mankind has a deep need to explore, to learn, to know. We also happen to be sociable creatures. It is important for us to know if… — Stephen Hawking Copy Share Image
