0:00:08 > 0:00:10Hello, Jenny here, with your Sunday afternoon Newsround.
0:00:10 > 0:00:13We've got loads for you today, online and on TV.
0:00:13 > 0:00:15Here's what's coming up in the next six minutes...
0:00:15 > 0:00:17An awesome time-lapse of the first three months
0:00:17 > 0:00:18of Nora the polar bear's life.
0:00:18 > 0:00:21Keep watching for the strangest news stories of the week.
0:00:21 > 0:00:27This is Newsround.
0:00:30 > 0:00:32First, one of the biggest, most colourful carnivals
0:00:32 > 0:00:35in the world has started in Rio, in Brazil.
0:00:35 > 0:00:39More than a million people are expected in the city,
0:00:39 > 0:00:42to take part in the celebrations.
0:00:42 > 0:00:44People wear amazing costumes, and dance through the streets.
0:00:44 > 0:00:47The BBC's Julia Caniero is there.
0:00:47 > 0:00:54It's the first day in Rio and this is one of the many street parades
0:00:54 > 0:00:58or blocos that are happening across the city.
0:00:58 > 0:01:00is very traditional.
0:01:00 > 0:01:09They are playing the old carnival songs that people here grew up
0:01:09 > 0:01:12so there are many families here and this is a good example
0:01:12 > 0:01:14of how people in Brazil learn to enjoy carnival
0:01:14 > 0:01:19from a very young age.
0:01:19 > 0:01:21Well, the Rio Carnival is still going ahead,
0:01:21 > 0:01:25despite worries about a virus called Zika, which is spreading in Brazil,
0:01:25 > 0:01:28and other parts of South America.
0:01:28 > 0:01:30Doctors around the world are looking for ways to help the people
0:01:30 > 0:01:32there affected by it.
0:01:32 > 0:01:33Martin has been looking into what Zika is
0:01:33 > 0:01:35and how to fight it.
0:01:35 > 0:01:38Zika is a disease carried by mosquitoes.
0:01:38 > 0:01:41When a mosquito bites people, it can it spread the disease
0:01:41 > 0:01:44from person to person.
0:01:44 > 0:01:47The type of mosquitoes that carry the disease live in tropical
0:01:47 > 0:01:50countries, so it's not likely to affect the UK.
0:01:50 > 0:01:54When people do catch the virus, usually it's very mild,
0:01:54 > 0:01:57so mild that they don't know they were infected afterwards.
0:01:57 > 0:02:00You feel a bit unwell, like you've got a cold,
0:02:00 > 0:02:04but it's more serious if a woman is having a baby.
0:02:04 > 0:02:07Scientists say they think it may affect how a baby grows
0:02:07 > 0:02:07before it's born.
0:02:07 > 0:02:10Doctors around the world are now coming up with ways
0:02:10 > 0:02:11to try to deal with Zika.
0:02:11 > 0:02:14While scientists are making new medicines and vaccines to stop
0:02:14 > 0:02:19Zika virus, everyone is going to be working to make sure people don't
0:02:19 > 0:02:20get bitten by mosquitoes.
0:02:20 > 0:02:24They're going to be trying to get rid of the mosquitoes and that
0:02:24 > 0:02:27will actually stop a lot of different diseases.
0:02:27 > 0:02:28Let's get some sport now.
0:02:28 > 0:02:31You've been telling us who you think will win the Six Nations
0:02:31 > 0:02:33and it's turning into a battle!
0:02:33 > 0:02:35Menna thinks...
0:02:37 > 0:02:38But John thinks...
0:02:38 > 0:02:41But John thinks...
0:02:41 > 0:02:44Menna and John will be glued to their screens later,
0:02:44 > 0:02:47when Ireland and Wales meet for their match in about an hour.
0:02:47 > 0:02:49Ireland will be trying to make it three Six Nations
0:02:49 > 0:02:51title wins in a row.
0:02:51 > 0:02:52Wales came third last year.
0:02:52 > 0:02:54Owan is also a Wales fan.
0:02:54 > 0:02:54Owan is also a Wales fan.
0:02:54 > 0:03:00He says...
0:03:00 > 0:03:02And we've heard from Scotland and England fans, too.
0:03:02 > 0:03:08Robbie says...
0:03:08 > 0:03:10And Kieran says...
0:03:10 > 0:03:10And Kieran says...
0:03:10 > 0:03:12Thanks for all your comments.
0:03:12 > 0:03:13On to football now.
0:03:13 > 0:03:18Manchester United are away at Chelsea in today's 4 o'clock game
0:03:18 > 0:03:19in the Premier League.
0:03:19 > 0:03:21United are currently 13 points behind the leaders,
0:03:21 > 0:03:25Leicester, but a win against Chelsea later
0:03:25 > 0:03:29will keep them in the race for the top four.
0:03:29 > 0:03:31Next, sport doesn't come much bigger than the Superbowl.
0:03:31 > 0:03:33More than 100 million people, all round the world,
0:03:33 > 0:03:36will be watching the biggest American Football game of the year
0:03:36 > 0:03:39later, as the Denver Broncos take on the Carolina Panthers.
0:03:39 > 0:03:42And even though it's in America, there is a little bit of Britain
0:03:42 > 0:03:44in there, too.
0:03:44 > 0:03:48Panthers star, Graham Gano, was actually born in Arbroath,
0:03:48 > 0:03:51in Scotland, and although he grew up in the US, he hasn't
0:03:51 > 0:03:54forgotten his roots.
0:03:54 > 0:03:57My dream growing up was always to play for the Scottish national
0:03:57 > 0:03:59team and never to play football, so it's changed a little bit,
0:03:59 > 0:04:05but I'm really excited to have the jerseys now.
0:04:05 > 0:04:07And, finally, I'm going to put it out there -
0:04:07 > 0:04:09this could be the cutest thing you see this year.
0:04:09 > 0:04:11Meet Nora, the polar bear cub.
0:04:11 > 0:04:13At Columbus Zoo, in the US, they've been filming the first
0:04:13 > 0:04:1583 days of her life.
0:04:15 > 0:04:18From having a feed, and taking a nap, to playing with her toys,
0:04:18 > 0:04:20Nora has been having an awesome time.
0:04:20 > 0:04:21The full time-lapse is on our website.
0:04:21 > 0:04:25I know I'll be watching it, on repeat, all afternoon.
0:04:25 > 0:04:26Next up, something strange.
0:04:26 > 0:04:27Very strange.
0:04:27 > 0:04:30Here's our round up of the week's weirdest news stories.
0:04:30 > 0:04:38Enjoy.
0:04:38 > 0:04:40What do you do if a zebra escapes from your zoo?
0:04:40 > 0:04:43Staff at Japan's Ueno Zoo have a pretty good plan.
0:04:43 > 0:04:45They practised by getting one of their staff to dress up
0:04:45 > 0:04:47as a zebra and try to escape capture.
0:04:47 > 0:04:48They managed to trap the...ahem...
0:04:48 > 0:04:54animal with a net, ready to take it back to its enclosure.
0:04:54 > 0:04:56Are you a cat or a dog person?
0:04:56 > 0:04:58That's the question we asked all week, after the release
0:04:58 > 0:05:00of a new BBC Two documentary
0:05:00 > 0:05:03called Cats v Dogs, Which Is Best?
0:05:03 > 0:05:06Martin and I even did our own little survey at a school.
0:05:06 > 0:05:07Guess who won?
0:05:07 > 0:05:15MIAOWING AND BARKING
0:05:15 > 0:05:18Team Dog!
0:05:18 > 0:05:19CHEERING
0:05:19 > 0:05:21Finally, have you ever wondered what the sound
0:05:21 > 0:05:22of rhubarb growing is?
0:05:22 > 0:05:24I know I have.
0:05:24 > 0:05:25SNAPPING
0:05:25 > 0:05:26Catch that?
0:05:26 > 0:05:28This is what's known as Rhubarb Triangle
0:05:28 > 0:05:33in West Yorkshire, where they've been celebrating the arrival
0:05:33 > 0:05:35of the first rhubarb crop of the season with
0:05:35 > 0:05:36a special exhibition.
0:05:36 > 0:05:39Let's hear that one more time...
0:05:39 > 0:05:42SNAPPING
0:05:42 > 0:05:44Something else very strange for you online -
0:05:44 > 0:05:45dogs in fancy dress!
0:05:45 > 0:05:48You do not want to miss it, especially the one dressed
0:05:48 > 0:05:49as a hot dog.
0:05:49 > 0:05:514 o'clock Club is up next on CBBC.
0:05:51 > 0:05:52Goodbye from the weekend team.
0:05:52 > 0:05:56Newsround's back tomorrow morning!