Hello, SFIA audio listeners. In this month's Nebula exclusive, big alien theory,

we're asked at the reason alien civilizations might be rare is because most aliens are huge.

To hear it and every episode early and add-free, plus hours of bonus content,

check out go.nebler.tv slash Isaac Arthur and use my code, Isaac Arthur.

Good afternoon and welcome to an extra edition of Sci-Fi Sunday, featuring our four-part

co-existence with Alien series, originally recorded and produced for Nebula in 2019 and 20,

and has never before been seen on YouTube or any of our other platforms.

As channel regular's know, we had our end-of-the-month

live-stream Q&A scheduled for next weekend, that had to reschedule it to this weekend, May

21st, so I could co-host the International Space Development Conference. However, I've just

had a minor surgery on my nose and tongue, and as you can probably tell, my voice is still

recovering and not ready for an

hour of live Q&A.

Fortunately, our 4-part co-exist in an Alien series has a combined runtime of just over an

hour, so it seemed a great replacement and it will cover a number of ways we might coexist

with aliens, beating with Alien's Zetor Psychology in part 1, and movie-on to look at trade,

war and alliance in parts 2, 3 and 4.

And without further ado, let's get started.

How do you greet an alien visitor and ensure you don't create an interstellar diplomatic

incident?

Or worse. The universe is an immense and ancient place, filled with billions of trillions of stars,

many of which may have hosted life and have given rise to civilizations.

...