How might the discovery of life on another planet affect our actions here on Earth?
How did early exploration, encounter, and trade shape our history?
What is the threshold between safety and risk for exploration?
What do you think would be most exciting about living underwater?
If the world has already been discovered, is there still a need to explore?
How can the logistical challenges of manned travel to Mars best be solved?
If all places in the world are inhabited, do we have the right to explore?