04/06/2016 Newsround

Good afternoon - Ricky here with your Saturday

First up, one of sport's greatest superstars

Muhammed Ali has died - he was 74.

The boxer was famous around the world, but not

We've been taking a look back at his life.

I want everyone out there to know this, I am the greatest.

Muhammad Ali, the world's most famous boxer.

Born with a different name, Cassius Clay,

He first achieved fame when he won gold

He was famous for the way he talked and the things he said.

He won his first world heavyweight title at the

But Muhammad Ali was more than just a boxer.

He campaigned for civil rights at a

time when black people in America were treated differently.

The boxer converted to Islam and changed

He spoke out about racism and the world

One of his most famous fight was nicknamed the Rumble in

It took place in 1974 against George Foreman.

If you think that, wait until I get George Foreman.

He is ugly and I am the true champion.

He was so tired he just fell on the ropes.

I said, man, this is the

It made life difficult for the boxer but he

In 1999, Muhammad Ali won the BBC Sports Personality

He got more votes than the rest of the contenders put

He is known all over the world and will

be remembered for being the greatest.

Next, is there life beyond our planet?

That's what scientists are aiming to find out with the Square

It's a huge radio telescope which will be able to search further

Aliens. Are they really out there? If so, are we ever going to find

them? The universe is vast. The solar system is just one of the

solar systems around the sun which is one star amongst millions of

stars in the galaxy and our galaxy is one among the millions of

galaxies in the universe, so why not? Maybe there is light somewhere

in another solar system in another galaxy. That's what scientists are

trying to find out with the help of these. This is the Square Kilometre

Array project. When it is finished, it will be the world most powerful

audio telescope, so sensitive that it will be able to detect a signal

from a planet that is tens of light years away. These telescopes are

listening for intelligent life and that is why they have decided to

build them here. What makes this place in South Africa perfect is

that there are no radio waves around to mess up the signal. No

microwaves, no mobile phones. I have had to turn mine. Every day these

dishes are collecting massive amounts of data. That will

eventually be processed by a supercomputer in the UK. And experts

will look for any signs of life. How do you go about looking for alien

signals? You got bigger telescopes like that and they can listen in the

universe and listen for radio signals from other planets where we

hope they also have radio signals and maybe we can detect some of

these signals. How would we know that aliens have tried to contact

us? We are looking for intelligent signals, not from nature but made by

intelligent creatures. Will we ever be able to find an Indian? Certainly

hope so. I hope to find them once in my lifetime but it could take a long

time and also it can take long to communicate with them because the

signals take maybe years to go to the civilisation and also years to

come back so one simple question and answer could take 40 years. Of

course there is no guarantee that other civilisations exist beyond our

world but if they do, it might not be long before Square Kilometre

Array finds them. Last up, Andy Murray

is through to the final He beat Stan Wawrinka

in three sets and faces If he wins he'll be

the first British man to win We're back right here just

before 2 - see you then.