Neil deGrasse Tyson

So if it happens in one place, the chances are it's not going to happen in other places.

And if it's going to get there, it's going to have to travel.

I think that's the out for that's the argument in favor of panspermia.

But because if it's easy to make amino acids, but harder to make a DNA molecule, maybe that's

Your sugar is to go with your multigrain cereals.

Kellogg's better get a handle on this one of course as scientists we need to be sort of skeptical of extraordinary claims if life can explain some of this evidence can you get to that same evidence by not invoking life at all

As a person who is in front of the public explaining all of this, I have challenges because, for example, when we see methane on Mars and we know methane is a product of anaerobic metabolism.

Better known as Mexican food.

I ain't going there.

It's what happens deep in your gut, right?

The microbes operate anaerobically, releasing methane.

But yet the surface of Saturn's moon Titan has lakes of liquid methane.

But there are no cows on Titan that we know of.

So clearly methane is coming from non-biotic means.

And so to jump for joy when we see a chemical signature of something that we know can come from life, we have to be very honest about all the ways that it might not.

Now, at the beginning of this conversation, you mentioned the possibility or being cautious about a rock that might hit Earth by, you know, 2200.

I don't think you pull that number out of your ass.

Not this time.

Yeah, yeah, yeah.

You're out of the picture by then.