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, everybody, and welcome to today's live stream.

We'll be taking questions pretty much right from the top and trying to get to as many as possible today.

So as these come in, go ahead and start putting them in the chat window and we'll get started as soon as those pop in.

While we're waiting for those to show up, we do have a slightly modified schedule.

We still have our normal weekly episodes for April, but we are going to have the first

Clark Tech bonus episode this upcoming Sunday, not this Sunday, but the next one.

So that we've got, what was it, techno-primitivism this upcoming Thursday?

And then we'll have Clark Tech on anti-gravity that Sunday.

And then we'll go back to the normal schedule, which be future pets on April 11th.

And then it's giant robots on April 18th.

I still can't believe I've talked to that episode.

All right. So make sure to start getting your questions in and as a heads up when you're putting the questions in, the more concise those are, the more well spelled they are, the more likely they ought to get to be because we don't have time to recopy or interpret them as we go.

All right.

So we always have this bit of a lag while people put questions in.

What else is going on for the week while we're waiting?

Let's see.

Ah, question.

Selina asked, you said in one of your episodes that data has no mass.

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