05/04/2017 Newsround

You're watching Newsround, with me, Leah, this Wednesday afternoon.

We're live for the next five minutes.

Coming up:

This spacecraft's final mission on Saturn.

And how peanut paste is saving kids' lives.

First, a service of hope and remembrance has been

held in London two weeks on from the Westminster attack.

Five people, including the attacker, died, and at least

50 people were hurt.

Today, 2000 people gathered at a multi-faith service

in Westminster Abbey, including family of those who died,

emergency services staff, and the Duke and Duchess

of Cambridge.

The violent assault two weeks ago against Londoners and visitors to

the city from around the world, and the killing

of a police constable on

duty at the Palace of Westminster, have shocked people everywhere.

At a time of sorrow, a time when we are

tempted to despair, may we find hope.

And if you want to find out more about what happened

in Westminster two weeks ago, then head to Newsround online.

This small packet might not look like much, but it's saving thousands

of children's lives around the world right now.

Inside is peanut paste, and it's helping kids

who don't have enough to eat.

One place they're being used is South Sudan, in Africa,

where a famine has been declared.

BBC reporter Anna Foster is there and sent us this.

This is a special nutrition centre where mums bring their babies.

Just over there, they are being weighed, and

they have a special tape that goes round a baby's arm

to see whether or not it

is malnourished.

In this area, it is called Unity State, it is about the

size of Greater Manchester, and 290,000 children

are severely malnourished

and need serious help.

They come to places like this to get it.

There are lots of special things that can be given to the children

when they've had not enough to eat that really help

improve their health.

Emily is from Unicef, and what you are

holding here, Emily, is

something that looks really small in a packet, but this can save a

child's life.

It can.

So, this is a package of nuts, oil and milk, and

essentially what this does is, it nourishes the baby really quickly,

so a child will take this for about a week,

and you can see the

difference in a couple of days.

They put their weight back on, and it

completely changes their appearance.

So, it is a bit of a miracle food, really.

So, this would be the same as a meal?

Yeah, exactly.

They can take between one and three a day,

and for between seven days and 14 days, and what this will do is, it

will completely transform the children who are

severely malnourished.

This is really special stuff, and you can see some of the children

round here taking it.

A box of this is about ?60, and they say every box

save a child's life here in South Sudan.

Thanks, Anna.

You can find out more about the crisis in South Sudan,

and why it's happening, in our guide at Newsround online.

A spacecraft that's been orbiting around the planet Saturn

for the past 13 years is about to start its final mission.

But what exactly will it be doing?

Here's Jenny.

Meet Cassini.

Liftoff of the Cassini spacecraft....

After a seven-year journey through the solar system,

it's been circling Saturn since 2004, its mission, to find out more

about the planet and its family of rings and moons, but not for much

longer, because it's running out of fuel.

But before that happens, it's got a pretty important job to do.

For the next five months, the spacecraft will dive through the

2400-kilometre gap between Saturn and its rings as part of the

mission's grand finale.

But that's not all.

This will happen not once but 22 times.

On the final orbit, Cassini will plunge into Saturn,

fighting to keep its antennae pointed at Earth as it sends its

goodbye message.

It's hoped the craft's final close-up findings will

help us understand how giant planets form and grow over time.

Pretty good for a final outing!

Finally, this pink diamond has been sold for a price

that's out of this world!

The rock is the largest of its kind ever found,

and has just been bought at auction for more than ?57 million

in Hong Kong by a jewellery shop.

That's all from me.

Newsround's back tomorrow morning with Jenny at 7.40.

Bye.