Jesse Rogerson

But there's some work that was done with deer that apparently shows that

the eyes of deer are sensitive to UV light, and there's UV light bouncing around our atmosphere all the time.

Now, what this researcher, what this group of researchers was interested in is like, does this have an actual biological reason?

Why do the deer need to see in UV?

And they found that in the autumn, when the antlers of the males grow big,

And they go around and they start rubbing their antlers on everything and peeing and pooing everywhere and marking their territory and making signals.

They went to where all these rubs are, where they rub the... Basically, it's like a blood-rich skin that kind of comes off their antlers onto trees and bushes and stuff.

And they went around and found them and then went back at night...

and found that if you shine UV light on where they were rubbing, they reflect back more than the surrounding area.

there's UV light bouncing off of these rub areas more and deer can see it.

And most other animals can't, or at least most other mammals can't.

So there's, they've realized that not only can, not only do these like rub spots shine in UV more than, or reflect in UV, I should say, but the deer can see it.

And there's a biological reason for them to have that.

Yeah, exactly.

They haven't nailed down exactly why it's there, but it's probably related to mating and territory for sure.

You're welcome.

I love doing it, too.

You ready to talk some science?

Yeah, 1995, that was the first official planet found around a sun-like star, 51 Peg B.

1995, it's a brand new field.