It's a plane.

It's a meteor.

We're training our eyes on the sky this Friday on CNN 10.

I'm Carla Zeus.

Here's what's up.

This week, there were more than 400 reports of fire in the sky.

There were mostly concentrated in and around Alberta, Canada, though the meteor was also visible in other parts of that country and in the U.

S.

State of Montana, thanks in large part to surveillance in doorbell cameras, the American media or society received more than 100 videos of this.

The thing was so bright it was classified as a fireball, according to NASA.

That means the rock could have been bigger than 3 ft in diameter.

It's a shocking celestial sight that looks really cool as long as it doesn't hurt anything.

And as far as we know it Didn't scientists believe it was just a meteor, not a meteorite?

What's the difference?

There are a lot of small rocks that air zinging through space.

They're called meteoroids.

If one of these rocks hits the earth's atmosphere, it becomes a meteor that's also known as a shooting star.

The streets you see across the sky are the result of Meteors burning up in our atmosphere, researchers say more than 90% of them burned up completely.

If they don't do that, though, if part of the rocks survives its entry and smacks into the earth's surface, it's then classified as a meteorite.

Thousands of tiny meteorites strike the Earth every year.

But as far as we know, the one seen this week in Canada wasn't one of them.

It's believed to have been a meteor.

There haven't been any fragments reported from the Earth's surface.

Initially, scientists didn't know how big it was, how fast it was moving and what it was made of.

But they're able to piece together some information about it, based on the multitude of different recordings taken from different cameras in different locations.

12th trivia Today How many cities have hosted both the summer and Winter Olympic Games?

531 or none?

No single city has hosted both seasonal Olympics before, but Beijing China is set to become the first next year.

Yeah, the Chinese capital hosted the Olympic Summer Games in 2008.

It's set to host the 2022 Winter Olympics next February 4th.

Looking ahead the events will return to Paris, France, in 2024.

Milano.

Cortina, Italy, in 2026.

Los Angeles, California in 2028 and the International Olympics Committee just announced yesterday that Brisbane, Australia is the preferred host for the 2032 Summer Olympics.

This is a new process for Olympic organizers.

They haven't announced the venue for the 2030 Winter Games yet, and Brisbane is bid to host the 2032 games isn't a done deal.

The IOC still has to vote on this to make it final.

But because hosting the Olympics takes years to plan for and because of the uncertainty that still surrounds the 2020 Games which were delayed by the coronavirus pandemic, the committee's trying to devise a stable and predictable way to determine future host cities.

In another sign that the Olympic and Paralympic Games will likely take place this summer on Thursday, Tokyo 2020 organizer's laid out their plan for the torch relay.

Starting in exactly one month, the torch will begin its 121 day journey and Fukushima, before making its way through all of Japan's prefectures of Fukushima, is one of the hardest hit areas during the 2011 Great Tohoku earthquake and tsunami, which caused a nuclear meltdown.

Now starting the relay in the region allows Japan the opportunity to highlight the reconstruction and recovery effort that has taken place since the devastating day nearly 10 years ago.

Now 10,000 torchbearers will take part in the relay and perhaps a sign of things to come during the Olympic and Paralympic Games summer mast.

Spectators will be allowed tow line, the relay route, but have been asked not to cheer and instead to show support by clapping.

Officials have also as Spectators to avoid contact with people, close spaces and crowded areas.

Temporary suspensions of the relay could take place if a large crowd forms now.

The format of the really could also change depending on cove in 19 restrictions in each prefecture.

Blake Essig, CNN Tokyo.

Next stories about Eurasian beavers on the river Otter.

Let's explain.

The otter is the name of a river in Devon, England, these wild Eurasian beavers or some of the first to live there in about 400 years.

These animals were hunted to near extinction before the 20th century, in part because they were prized for their for used in felt hats.

But conservation efforts have helped the species recover, even though their relationship with people still isn't perfect.

What people didn't realize is how important beavers are to the landscape.

The dams they build, regulate water flow, increased biodiversity and even drive down pollution.

In short, beavers are what are known as ecosystem engineers.

Beavers build dams and canals for their own protection.

The dams raised the surrounding water, which helps them escape from predators.

But wetting the landscape has a greater impact.

It also slows the water flow, reducing floods downstream in the wet season and drought in the dry season.

Experts warn that areas like Devon are expected to Seymour flooding.

But a recent study on Beavers in England showed that their dams can reduce average floodwaters by up to 60%.

The organization behind reintroducing beavers to Devon is the Devon Wildlife Trust.

But before they released any beavers into the world, Ecologist ran a trial and how beavers might change the landscape.

So this is a three hectare enclosure that was built in 2010.

What can you see?

That's right, that's the damn there.

That goes away across.

It's about 40 m long.

When we put them in here and started to see what they did to the watercourse, it was really profound, you know, we all suddenly became much more conscious of just how powerful this animal Waas the trust received permission to release beavers into the wild in 2015.

It was the first license in England to do so in the effect on the River Otter Basin.

Waas Dramatic.

This pond is being created by the Beavers, so they built a small dam that has increased the water level in this area that's enabled them to build a lodge on this island.

Beaver lodges the home off beavers.

The entrance to the lodge is underwater right now.

We've probably got the adult pair in this island, along with kits from this summer on the previous summer, so there might be eight beavers in that lodge right now.

There's also been a huge increase in biodiversity.

Is the wetland habitat attracts water?

Voles, otters, amphibians on birdlife.

But beavers can cause trouble.

For one, they're big beavers like pink tag can weigh up to 30 kg or £66.

That's quite a Big Dog.

We've had fishermen telling us stories that they've been a bit scared Whilst fishing close to beavers.

They also can waterlogged farm land and eat orchard trees.

So a big part of chanting Elliott's job is working with local landowners to make sure everyone is happy.

But overall, beavers are a huge benefit.

Ecosystems and society nations across Europe are working to restore them to their original range.

It's being a hugely successful conservation story.

Beavers were reduced to around 1200 back in the 19 twenties, and now there are over a million beavers within Europe.

We've heard of the eye of the tiger, the roar of the tiger paper tigers and a neon tiger.

But this is the first time we've heard of a singing tiger.

Fascinating.

Let's hear Mawr.

I think we need to work on your pitch.

Oh, his cat got your tongue?

Well, I think you can advance, but you'll be working with Lionel Richie.

So this is what's being called a singing tiger.

He's an eight month old male cub in a Siberian zoo who is able to hit high notes that other tigers can't.

Officials say he's not in pain.

This is just what he does to get attention.

Tiger Tiger burning bright in the music halls of night It's not in roars that you delight or person first that others might.

You're a cat of different stripes hitting high notes with your pipes on the prowl and Cajun meadow from the pitch of your falsetto.

You're a rebel without a cause, lifting voice through open jaws singing not just for applause, but just because you can.

Entertaining Beast and man.

Apologies to William Blake.

Shout Out Toe Waterville Senior High School in Waterville, Maine.

Water.

You think of Friday's They're awesome.

I'm Carla Zeus for CNN.

Mhm.

Really?

Yeah.