11/02/2017 Newsround

It's Saturday, I'm Jenny and it's another big weekend

of sporting action - first up, it's the Six Nations.

And one of the tournament's biggest games takes place later -

Wales take on England in Cardiff.

It's the 130th time they've played.

Last week, Wales beat Italy and England squeezed past

France to keep up their 15 match winning run.

Here's the Welsh captain, Alan Wyn Jones.

You come out and you've got 75,000 fans that

are there for what's hopefully

going to be a good 80-minute game.

You realise you're in a very fortunate place and you get to enjoy

the anthem before the game.

Hopefully we can put smiles on faces.

And we want to know what you think will happen.

Can England keep their winning record going

or will Wales beat them?

Go online and let us know.

Volunteers in New Zealand have managed to re-float about 100

of the 400 pilot whales that became stranded on beaches on Friday.Sadly

many whales have died and it's thought another 200 many have

got stuck overnight.

It's the worst case of this type the country has ever seen.

It's not uncommon for these animals to become beached like this.

But why does it happen?

Here's what you need to know.

Beaching is when whales become stuck on sand and it can be very

dangerous.

Marine scientists then have one clear reason to explain why

it happens.

Here are some of the theories.

It's thought some whales become stranded because they are

sick or injured and are pushed in shore by currents, or are simply too

ill to swim.

Whales rely on something called sonar to work out

where they are and where they are going.

They send sound waves or pulses which bounce back of surfaces.

Some ships use of sonar pulses, too.

They have been linked to whales getting stranded because

scientists think if the two crossed paths, the whales could become

confused or injured.

It's thought changes in the environment could

cause them to behave differently, too.

Perhaps food stocks are low, temperatures are unusually high

or low, or the water they are in has become polluted.

Even whales make mistakes.

It is thought they can sometimes lose their way into

shallow waters by accident while travelling to warmer waters to mate.

Whales are very sociable creatures and often travel

in large pods or groups.

Marines think if any whale is affected by any of the last four

reasons, any travelling with it will copy them.

That's all from me, for now, Newsround's back

right here at 11.55.

Bye!

-- 12:15.

Have

Have a

Have a great

Have a great Saturday!