Neil deGrasse Tyson

Isn't gypsum on the Mohs scale?

I have some memory of that.

Gypsum is very soft.

It's like one or two.

Okay.

Now, oxygen is not uncommon in the universe, but it's highly reactive, right?

So it's going to be binding with almost everything.

And so where is it getting its oxygen from?

What's its source?

In the Cheva Falls, in that, those deposits, I don't know, is that the right word?

Inclusions, those, yeah.

Are you convinced that there was an active biota in the distant past from that evidence?

Or is there another way to explain that, that does not involve life?

Because life would be extraordinary and fun, but, you know, you geologists have all kinds of ways you can make stuff, even without life.

So I found a fascinating concept.

Let me just share it with you and tell me if you agree.

So the biologist sees life on Earth

And we don't see life elsewhere as thriving as it is on Earth.

So it's easy to just come up with the singular genesis of life on Earth by whatever cause.

And we know how complex the DNA molecule is.