Nell Greenfield Boyce

So, you know, there's these, you know,

species that live kind of like in relationships with bacteria that help them get nitrogen.

Yeah.

So they have plenty of nitrogen and they don't seem to bother to turn red.

Oh, well, that's a really revealing detail.

Yeah.

I mean, it's it's suggestive, right?

I mean, there's a lot of kind of suggestive evidence out there.

So like Suzanne Renner told me that trees in Europe tend not to be as red as in the U.S.,

And she did the study looking at the sunlight that comes in.

Actually, you can look at it by seeing what hits solar panels.

There's all this data out there on solar panels.

And she found that trees in Europe get exposed to less solar radiation than

than trees in the northeast U.S.

You know, so she's saying, like, maybe they just have less need for this kind of red sunscreen.

Again, it's, you know, a correlation.

It's suggestive.

No.

OK, so there's this whole other line of thinking.

And I was talking with one evolutionary biologist who's named Marco Archetti at Penn State.