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.

Has Perseverance found life on Mars?

The short answer is no, and longer answer is kind of maybe.

But NASA announced that perseverance had drilled a rock core on Mars that might hold a biocenture,

and that word is the closest we ever come to saying, we found life on Mars. They didn't say that, but a lot of articles sure did right after.

At the time I was writing about the interstellar comet 3i Atlas, and its alleged techno-centurers,

and I thought it would be a good idea to cover not only the news from Mars, but to discuss

biosensures more and what makes them

different from technocinchers.

And while channel regulars know I tend to be very skeptical of alien technocinceres, the reverse

is not true for biosynchers.

I would not be surprised if those were fairly common.

We did not just find life on Mars, that's pure hype, but we found

it was a possible indicator of life, and we may find it there one day, and we did find

evidence that could legitimate the point that way. So today we'll dive into what

perseverance actually found in that rock called Chiava Falls in Chazaro Crater, why scientists are excited

and why they are also cautious. We'll also explore what a biosynchre really is, why it's

different from a techno-sensure, and what this discovery means for the long quest to answer

one of humanity's oldest questions. Are we alone? Setting the stage.

...