Hello, SFIA audio listeners.

In this month's Nebula exclusive, big alien theory,

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

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

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

Good afternoon, everyone, and welcome to the SFIA monthly live stream Q&A.

We'll get started in just a moment, but go ahead and start getting your questions in the chat

window so our moderators can start relaying those to me as soon as we start.

Please try to keep the questions concise and watch your spelling and try to be polite to so our moderators can start relaying those tubing as soon as we start.

Please try to keep the questions concise and watch your spelling and try to be polite to others

in the chat.

We usually go for about an hour so you probably want to grab a drink and a snack, though

we'll take a break about halfway through too.

With all that said, welcome and let's get started.

Good afternoon everybody and welcome to our monthly live stream with Science and Future with Isaac Arthur and I am Isaac Arthur and my wife was just told you before we got started

that this is the roughly two year anniversary of us doing the live stream.

So this is number 23,

but we skipped a couple occasions. Two years now doing live streams, and hopefully they've gotten

a bit better. We'll get your questions in just a moment, and just go ahead and give those to the

mods, and they'll bring them up to me as soon as we can. We'll have a couple of them from last time,

and we'll go ahead and get started. Yes, thank you, Isaac. This is Sarah. I think you forgot to mention that I was going to be

reading the questions to you today. Yes, my wife, Sarah, whose voice your hearing is one of

...