0:00:05 > 0:00:08It's Saturday, I'm Jenny and you're watching Newsround, live on CBBC.
0:00:08 > 0:00:11You won't want to miss all this:
0:00:11 > 0:00:12We've got everything you need
0:00:12 > 0:00:16to know on the first day of Rio 2016.
0:00:16 > 0:00:18And the latest on the cat fight kicking off at
0:00:18 > 0:00:23the Prime Minister's house.
0:00:31 > 0:00:33First, spectacular fireworks, a parade of nations from around
0:00:33 > 0:00:35the world and the lighting of the famous torch.
0:00:35 > 0:00:36We're talking about the 2016 Olympic Games opening ceremony.
0:00:38 > 0:00:48Ricky was there, at the stadium in Rio to watch the magic happen.
0:00:50 > 0:00:53Here we are inside the Maracana with the opening ceremony.
0:00:53 > 0:00:56Thousands of people in here have just sang the
0:00:56 > 0:00:58Brazilian national anthem and now we are expecting the show
0:00:58 > 0:01:08to really begin.
0:01:08 > 0:01:11The organisers of the show have used a really clever way
0:01:11 > 0:01:14to show the story up by projecting these
0:01:14 > 0:01:16fabulous images onto the floor.
0:01:16 > 0:01:23It looks stunning.
0:01:23 > 0:01:25It would not be an opening ceremony without fireworks.
0:01:25 > 0:01:31I tell you what, Brazil has not disappointed.
0:01:31 > 0:01:37And there we go, Team GB have just entered the stadium with
0:01:37 > 0:01:38Andy Murray waving that flag.
0:01:38 > 0:01:42We welcome you in Rio, the Olympic city.
0:01:42 > 0:01:48So there you go,
0:01:48 > 0:01:51the flame has been lit in the stadium.
0:01:51 > 0:01:54The Games have officially begun.
0:01:54 > 0:01:56I think this opening ceremony was all about having fun,
0:01:56 > 0:01:59dancing and loads of colour.
0:01:59 > 0:02:01But now the serious stuff begins, the sport.
0:02:01 > 0:02:03Over the next two weeks, it's all going to be about
0:02:03 > 0:02:08bronze, silver and gold.
0:02:08 > 0:02:10Thanks, Ricky, looks incredible.
0:02:10 > 0:02:13Well, it doesn't stop there, there's a full day of sporting action ahead.
0:02:13 > 0:02:23Here's what's coming up.
0:02:23 > 0:02:25Fresh from his victory in the Tour de France,
0:02:25 > 0:02:28Chris Froome will take on Rio's cobbles and climbs
0:02:28 > 0:02:30in the gruelling men's road race.
0:02:30 > 0:02:35That is more than 250 kilometres.
0:02:35 > 0:02:37Commonwealth Games champion Geraint Thomas is also a
0:02:37 > 0:02:39strong medal contender.
0:02:39 > 0:02:43He is aiming for Olympic gold too.
0:02:43 > 0:02:45He is known as the bad boy of judo but after
0:02:45 > 0:02:48a disappointing performance in London four years ago,
0:02:48 > 0:02:55Ashley McKenzie is aiming to come back to Rio stronger than ever.
0:02:55 > 0:02:58If you are allowed to stay up late tonight, watch out
0:02:58 > 0:03:02for the first of Team GB's medal hopes in the swimming pool.
0:03:02 > 0:03:0520-year-old James Guy came out of nowhere to clinch gold in the
0:03:05 > 0:03:09200 metres in the World Championships last year.
0:03:09 > 0:03:15In Rio, he will compete in the 400 metres freestyle.
0:03:15 > 0:03:17And we want to know what event you are really
0:03:17 > 0:03:18looking forward to?
0:03:18 > 0:03:19Are you all about the athletics?
0:03:19 > 0:03:21Tuning in for tennis?
0:03:21 > 0:03:23Or mad about the marathon?
0:03:23 > 0:03:26Get online and tell us what you're watching and why.
0:03:26 > 0:03:29Carys has already emailed and she says she'll definitely be
0:03:29 > 0:03:32watching the gymnastics because she's a gymnast
0:03:32 > 0:03:35herself and she can use it to learn more skills.
0:03:35 > 0:03:36Thanks, Carys.
0:03:36 > 0:03:39Keep those coming in.
0:03:39 > 0:03:41Next, a big row has been taking place on Downing Street,
0:03:41 > 0:03:43where the Prime Minister lives, in London.
0:03:43 > 0:03:45But this time it's not between the politicians,
0:03:45 > 0:03:47but the cats who live there.
0:03:47 > 0:03:52BBC political correspondent Chris Mason has been investigating.
0:03:52 > 0:03:54MEOWING
0:03:54 > 0:03:56Take a look at this.
0:03:56 > 0:03:59Larry, the Prime Minister's cat and Palmerston, the
0:03:59 > 0:04:03Foreign Secretary's cat, fighting.
0:04:03 > 0:04:05BELL RINGS
0:04:05 > 0:04:08Experts say it is all down to territory.
0:04:08 > 0:04:10Larry sees Downing Street as his patch and
0:04:10 > 0:04:15Palmerston is not welcome.
0:04:15 > 0:04:16It's Larry the cat.
0:04:16 > 0:04:18We are at the home PURR-litical reporting, the
0:04:18 > 0:04:22home of the Prime Minister, Theresa May, and the home of Larry the cat.
0:04:22 > 0:04:24This is Downing Street.
0:04:24 > 0:04:28And now, there is another cat on the block.
0:04:28 > 0:04:31This is Gladstone, the Treasury cat.
0:04:31 > 0:04:35So a friend to join Larry patrolling the streets of power in Westminster
0:04:35 > 0:04:38or another enemy?
0:04:38 > 0:04:42With all this fighting, could a third pet prove
0:04:42 > 0:04:46to be a CAT-astrophe?
0:04:46 > 0:04:49Five million people in the UK have asthma, a condition which can
0:04:49 > 0:04:50make it hard to breathe.
0:04:50 > 0:04:53Most of them use inhalers to make them feel better,
0:04:53 > 0:04:56but now scientists are working on a pill to treat it instead.
0:04:56 > 0:04:59The team say their study shows 'massive promise'.
0:04:59 > 0:05:03Although a lot of work still needs to be done, it's thought it could be
0:05:03 > 0:05:06a step towards making new medicine.
0:05:06 > 0:05:09I think it's important in lots of ways.
0:05:09 > 0:05:12We have had really good treatments for asthma for many years
0:05:12 > 0:05:15that are delivered through inhalers which are great.
0:05:15 > 0:05:17But there is no doubt that lots of people with
0:05:17 > 0:05:19asthma really don't like inhalers so to
0:05:19 > 0:05:21have the opportunity of having a new treatment in a tablet
0:05:21 > 0:05:22form is hugely exciting.
0:05:22 > 0:05:26Now last up,
0:05:26 > 0:05:31ever wondered what a singing robot sounds like?
0:05:31 > 0:05:33Like this, apparently.
0:05:33 > 0:05:34Weird.
0:05:34 > 0:05:37Alter the robot has been programmed by scientists to mimic the way human
0:05:37 > 0:05:41brains work so that it has complete control over its limb movements
0:05:41 > 0:05:43and facial expressions.
0:05:43 > 0:05:50It was made by a team in Japan.
0:05:50 > 0:05:51Nice
0:05:51 > 0:05:52Nice moves.
0:05:52 > 0:05:53That's all from the team for now.
0:05:53 > 0:05:55Newsround's back right here at 1.40pm.
0:05:55 > 0:06:00Bye!