Ask Aristotle: What would you say to an alien?

The recent expedition from Artemis II has reignited an age-old question: is there extra-terrestrial life out there? And if there is, what should we do about it?NASA's administrator Jared Isaacman says that question is at the heart of much of the work in space exploration. It raises a whole lot of hypothetical scenarios, but what does it mean for our concept of humanity?