Part of what drives us to explore and discover is the intangible: expanding our horizons, feeding our curiosity, finding all those unexpected things, and trying to answer those profound questions discussed in previous chapters, like how did the universe begin? How did life begin? Are we alone?
Nancy Atkinson, Incredible Stories from Space: A Behind-the-Scenes Look at the Missions Changing Our View of the Cosmos
planetary-exploration, space, space-exploration