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 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 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 and welcome to our monthly live stream Q&A. I'm your host, Isaac Althor,

and this typical end of the month Sunday thing we do here is we ask questions from the audience.

Those get relayed to my wife, Sarah, who will be reading them off to me as we go,

and doesn't realize she started camera at the moment. And we are joined today also by one of our regular co-writers, Jerry Gorn, and Cominettos, who is in visiting for the weekend and maybe read off some questions as we go.

So we're going to get to your questions right from the get-go.

About halfway through as usual, we'll take a break and just get your questions in, the

moderators on the chat, and we'll ask them as we get a chance to go through.

Well, we had a question from Merrick Wikowski, and he says,

Isaac, we know that changing matter into energy is possible, and changing energy into matter should be.

Is it possible that K2 civilizations use technology that changes energy into matter,

...