05/08/2013 Newsround

Doctor Who coming up. I'm Leah and we've also go this on the way. We're

checking out the frankenburger that scientists say could save the

environment. You're live with Newsround. OK, let's get straight

into the latest in a long line of Doctors - Peter Capaldi was revealed

as the new man in the TARDIS live on BBC One last night. He'll take over

from Matt Smith during this year's Christmas episode. He said just

auditioning for the part was a dream come true and he's relieved he

doesn't have to keep the news to himself any longer. It is so

wonderful not to keep this secret any longer, but it has been

fantastic. For a while I couldn't tell my daughter who was looking on

the Internet and seeing people saying so-and-so should be the

doctor, and she was upset norm of them were saying me. So much hype,

and here to talk us through it, I can reveal the world's biggest Dr

Who fan is CBBC's Chris Johnson. Welcome, Chris - you predicted it

would be Pete on Friday - why was he the right choice for you? He has won

an Oscar for directing and loads of other stuff, he knows his television

so I am delighted he has got the part. He is delighted as well. We

have been speaking to some kids to find out what they thought. Take a

look at this. I was shocked. I was like, who is he? I don't really know

who it is. We would have liked it to be a woman. A lot of people on the

Newsround website as saying Peter is fantastic choice but there are some

concerns. Rosey in Wiltshire says "Nobody will ever be as good as Matt

Smith". And Harry in Swansea says "I don't like him because he doesn't

look right!" Chris what can you say to these guys? I would say, calm

down, don't worry. When David Tennant left everybody was saying

who is Matt Smith and later he was everybody's favourite doctor. In

terms of the age of the actor, it doesn't matter as long as they bring

something new to the part. The doctor can be in his 20s, his 50s,

and I think he will just bring something very unique to the part.

Well Chris thanks for coming in. Well, it seems lots of Doctorr Who

fans are still not entirely sure what to expect from Peter Capaldi,

so we've put together five top facts about the newest Time Lord. At

school Peter was the singer of a punk rock group. He is a Doctor Who

super fan himself, when he was 14 he wrote letters to the makers saying

it inspired him to work in TV. You might not have seen him in action

before but he has won awards and even an Oscar in the past. He has

already been in an episode of Doctor Who... And from the king of time

travel to a futuristic frankenburger. The meat was grown in

a laboratory and the scientists behind it say the technology could

help the environment and prevent cows having to be killed in the

future. It was revealed at a secret location today and Ricky was right

there. Today scientists revealed and cooked the world's first laboratory

grown burger and the meat was made using special cells from a living

count, they then turned them into tiny muscles in the science lab and

mixed them with a chemical to help them grow. There is an intense

taste, it is close to meet, not that juicy. They say it is a more

environmentally friendly way of making meat. Making meat has always