22/09/2014 Newsround

Good morning, guys, Jenny here with the kids taking on this top author

Plus, the record breaking Batmen in Canada.

First, to some big news for all you space fans, as in the last few

hours a special craft that's spent 10 months travelling to Mars has

The Maven craft, built by US space agency NASA, has travelled more than

442 million miles from Earth and had to slow down enough to allow

All being well, it'll soon touch down on Mars and

spend the next year investigating why the planet is so dry.

Now to the kids taking to the pool with one of Britain's best

Gangsta Granny writer David Walliams, who swam

the length of the River Thames for Sport Relief, joined school

kids from across the UK to take part in a special swimming relay.

It's all to get more people into swimming.

BBC Sport's Mike Bushell donned his cap and armbands to have a go too.

He has tackled the English Channel and the Thames, but this weekend

David Williams was part of a relay team taking part in this relay. In

18 of mixed abilities, we were challenged with something 1000

metres each broken down into 250 metre chunks. The thing about the

challenge this that I have done before is I was not competing

against anyone. Here it is different because I got in first and the first

thing that happened is someone overtook me and went twice as fast

as me, so I didn't like it X by Craig that it

as me, so I didn't like it X by to see families enjoy swimming and

everyone doing it for the fun of it. Swim Britain, taking place this

month at ten venues across the country, instigate more of a

swimming, and being a relay event puts

swimming, and being a relay event family and friends to join in. It is

to try to get people to take part for the fun of it, and it is

important for kids to learn to swim. If kids could not swim it would be a

shame because there is so much fun you can have in the water. It can be

tough at times but you can count on your team-mates to support you on

your way around. Unless you keep them waiting too long. And you have

a comic genius on your team. I don't think he will finish until tomorrow.

Good luck, Mike. By! In other news, hundreds of thousands

of people have been taking to Thompson, turned out in London for

a special march to urge countries around the globe to cut the amount

of harmful gases they produce. It was one

of more than 2,000 marches planned for the start of United Nations

talks on the issue later this week. But probably not toads.

endangered species, you might Scientists in Scotland are worried

about the rare natterjack toad. I have come here to this big reserve

in Dumfries in the South of Scotland, and I am on the lookout

for something which is really hard to find, natterjack toads.

Natterjack toads usually live in salt marshes and sand dunes. This

environment is unpredictable and can leave the toads without access to

fresh water. Since the 1970s their numbers have been falling and

researchers think there are only 60 left in this part of Scotland. The

best time to spot them is at night. Using one of these, and one of

these. Kirsty is a toad expert and it is important to remember some

toads can be poisonous so it is best to leave it to the professionals

like Kirsty. Let's look. We have been searching that ours and

couldn't spot a single natterjack toad. Why is it so difficult to find

one? They need sand dunes because they go and hibernate in the winter

in the borrower and it keeps them warm. Throughout the UK there are

not a lot of them any more. Once a natterjack has been found, they are

measured and photographed and the information goes into a big

database. We have got fingerprints which are different, and the line on

the back of the toad is different for every toad. We have found some

toad lips which have emerged this year and got picked Jews of them.

The pictures will help scientists to keep track of the Endangered Species

Act. -- got pictures of them. Well, sticking with

the wildlife theme, loads and loads of you have been getting

in touch with your spider stories. It's after experts claimed

the mild weather recently could lead Apparently the warmer temperatures

mean there are more insects And you've been telling us

about your spider sightings on Goldie in London said she had a

spider dangle over her head in the car and it was huge.

Melly from London said, ?I've seen loads in my garden and

And finally, you might have always thought there was just one Batman.

Well, that?s definitely not the case in one Canadian city.

542 men in Calgary broke the Guinness World

Record for the largest gathering of people dressed as Batman.

They smashed the previous record of 250 people kitted out

That's all from me, Newsround's back right here at 4.20pm.