that is shaking up the art world.

For a century, the Mona Lisa has been considered

one of the most important paintings of all time,

but now we're learning it may only be half as special

as we thought.

There is only one Mona Lisa, right?

Well, maybe not.

This morning, what might be another Mona Lisa.

If it turns out to be a real Mona Lisa,

it could be worth half a billion dollars.

This controversial other portrait,

so similar to Leonardo da Vinci's masterpiece,

has long sparked intense debate.

Is it just a copy or an earlier version

finished by da Vinci himself?

JEAN-PIERRE ISBOUTS: The minute I saw this work,

I was really blown away.

It took me five minutes, and I was convinced.

Uh, it took you five minutes and you were convinced?

Maybe take ten minutes or 15 before you shake history?

What's your rush?

Like, maybe if you'd taken more than five minutes,

you might have noticed that the new Mona Lisa

is wearing AirPods, huh?

Because you realize,

if it's true, this story is huge.

Two Mona Lisas--

Mona Lises-- Mona Lisi...

However you say it, this is huge,

because it means that people in the 16th century

treated paintings the same way we treat Instagram today.

Yeah. Just like, "No, paint it again.

"I blinked.

"Also, my smile is weird on that one.

"I can't tell if I'm smiling or not."

"I don't even see it.

"I feel like this picture needs a filter.

Let's go to Valencia."

Oh, and speaking of earth-shattering news,

global warming. Every day we move closer and closer

to an all-out climate emergency.

And if you're worried that world leaders aren't up

to the challenge, well, you're right.

A dire warning about the future

after the United Nations climate talks come to an end in Madrid.

There's very little action,

even though evidence of climate change is all around.

REPORTER: The world struggled to respond to the crisis

at a U.N. climate summit in Madrid.

We are a little confused

about what documents are being discussed.

We're starting to get a little lost.

-Uh, we are kind of lost. Um... -Okay.

These are the warning signs our climate is in trouble.

200-foot flames this weekend

raced across the Australian Outback.

In Sydney, the smoke is so bad,

it's like smoking 32 cigarettes a day.

Greenland is losing ice seven times faster

than it was in the '90s.

The warnings are there,

but who is listening?

Are you shitting me?

The world is falling apart,

and leaders at the U.N. couldn't agree on what to do?

(French accent): "Yeah, we don't know where the papers are.

I'm sorry, we-we're a little confused."

You know what, from now on, climate meetings

shouldn't be in a comfy conference room.

They should be held on a melting glacier.

That's where it should be.

Get these people some motivation.

-That's what that should be. -(cheering and applause)

You'll figure that shit out.

And, you know, as much as we're disappointed

at how slow our leaders are to act,

I think it's movies that we should blame

for making us think that leaders are decisive in the first place.

'Cause, like, you watch Armageddon, and it's like,

"Sir, an asteroid is headed to Earth."

And it's like, "All right, get me Bruce Willis

"and the guy who's not good at being Batman.

Come on, let's go!"

But if, like, Armageddon happened in real life,

it would be like, "Sir, an asteroid is coming to Earth."

It would be like, "Okay, wait, are we calling it

"an asteroid or a comet?

Let's convene a panel to discuss terminology, okay?"

"We don't need a panel-- we need a committee!"

"Wait, is it a committee or a panel? I'm lost."

But we can't keep delaying action.

This is serious. The Earth is getting hotter,

the oceans are getting hotter,

Kumail Nanjiani is getting hotter.

We have to stop this madness.

All right, and, finally, some entertainment news.

Amazon is producing a Lord of the Rings TV show,

and if you think you don't have the looks for Hollywood,

this casting call might change your mind.

If you are hairy, toothless,

extremely tall, extremely short,

you could be an extra in the new Lord of the Rings series.

The new Amazon show is based

on the mythical land of Middle-earth

and begins production in New Zealand next year.

An ad from one of the two local talent agencies

helping with the search said it was looking for people

with, among other things, missing teeth

and wonderful noses.

Wow.

Missing teeth and wonderful noses.

Sounds less like a casting decision

and more like their makeup artist quit.

Yeah. Now they're just like, "All right, anybody, uh,

"that we gonna cast has to come already ugly, all right?

We gonna do this?"

And, by the way, I know they say that this is for the show,

but this might just be a trap for tricking people

into working in Amazon's warehouses. Yeah.

You'll be there, like, "I'm here for the audition."

They're like, "All right, take that PlayStation,

"put it in a box. Just keep doing that.

Do it again and again and again."

"What does this have to do with Lord of the Rings?"

"Yeah, they-they're doing PlayStations now.

It's a thing."

So if you think you can play an orc

or a dwarf or a hobbit, you can hit Amazon up.

But if you were looking to play Sméagol,

bad news: they already gave that part to Rudy Giuliani.

-Yeah. Yeah. -(gasping, applause)

He's got it. He's got it already.

And that's-that's really gonna mess the story up, right?

'Cause he's gonna be in the story in Lord of the Rings.

They're gonna be like, "We're going to Mordor

to find the ring." And he'll be like,

"And dirt on Joe Biden!"