03/12/2017 Newsround

Hello, I'm Hayley with all today's

news including the top sporting

sction from the weekend.

First to the Premier League

where Manchester United beat Arsenal

3-1 in a thriller last night.

United's goals came

from Antonio Valencia

and two by Jesse Lingard.

Arsenal tried to fight back

but they were stopped by a string

of outstanding saves from United

goalkeeper David de Gea.

But it was a bad night

for United's Paul Pogba who was sent

off for this tackle.

He'll now miss the Manchester City

derby next weekend.

Liverpool beat Brighton 5-1 -

Roberto Firmino scored twice -

sending the reds to fourth

in the table.

Everton won in Sam Allardyce's

first match in charge,

beating Huddersfield 2-0 thanks

to goals from Gylfi Sigurdsson

and Dominic Calvert-Lewin.

Now the last thing you want

when you're exploring another

planet is a flat tyre.

Well, Nasa has created a new one

to help avoid this happening.

These aren't just any old tyres.

These are NASA's new

airless chainmail ones.

They look pretty cool and they've

been designed to cope better

with the wonky surfaces of other

planets like Mars.

They're made from a material

which has its own memory.

After it's rolled over something,

it can remember its original shape.

This particular material doesn't

deform like conventional materials,

where in those materials,

when we put stress on them,

we basically are stretching the

bonds between the atomic structures.

This material has a unique

characteristic that allows it to do

an atomic rearrangement,

to accommodate deformation.

We can actually deform this

all the way down to the axle

and have it return to shape.

Sounds very high-tech and a bit

complicated, but essentially,

what it means is even if the tyre

gets really squashed,

it won't burst or break

but will bounce back.

That'll come in handy when it has

to drive over those big space rocks.

Now that's tyre-rific!

Next, if you like gymnastics

this one's for you.

Two sporty sisters and their story.

Hi, I'm Katie.

And I'm Izzy.

And you might have

guessed, we're twins.

Izzy's a brilliant gymnast

and when we were younger,

she used to compete at national

level on bar and beam.

But she had a really bad ankle

injury a few years ago,

which stopped her competing.

So how did it feel when you hurt

your ankle, and you thought that

you wouldn't be able

to do gymnastics again?

Well, I was really disappointed

and upset, because gymnastics

was everything to me and to think

that I wouldn't be able to do it

again just really upset me.

Was it really hard watching me?

I mean, it was taking a long time

to get better and I knew

I would get there eventually

but when I was waiting to be able

to do things and join

in with any kind of sport

again, and I was watching

you while I was coaching,

it just made me really frustrated

that I couldn't just jump

and jump onto the floor

and join in with you.

How does it make you feel being able

to do gymnastics again?

It makes me feel really happy

and delighted that I can do

the sport that I love and I'm

so thankful that my injury

didn't stop me from doing

gymnastics altogether.

This weekend, we are heading

to the London Festival of gymnastics

and this will be the first time

since we were younger

that we have performed together.

How are you feeling

about performing at the Festival?

Really excited because it's my big

performance with everybody and a bit

nervous, but mostly excited

and ready to do it.

It was really fun because

I haven't really done

anything like that before.

It was actually really exciting.

Now forget texting, snapchatting

or instagramming your mates.

These kids in Kidderminster

are going old school...

Dear dad, and to so much for your

very lovely and well-written letter.

But pen to paper. These guys aren't

helped Palace at the local home for

the elderly.

You get to listen to

what places they've been to and what

they've been doing. And stuff

they've done.

You get to ask them

all the questions you really want

and most the time they answer.

Without Snapchat or Instagram,

they're still having fun. But what

do their old pine pals think about

it?

I got a letter from the school

from one of your pen pals called

Tilly. Shall I read it to you? They

are lovely, those kids. What was

your favourite trip?

Weston-Super-Mare.

Weston-Super-Mare! Up to now, it's

just been letters but just before

Christmas, they will meet in real

life and be able to share their

stories face-to-face. How exciting!

Finally lot of you are getting in

touch to say who you think should

win tonight's X factor final. Tuck

are from Birmingham agrees she

thinks blacks who will win.

Ten-year-old Lizzie from West

Yorkshire says even though she likes

both acts, she once graced to win.

Thanks guys, and please keep sending

in your messages.