0:00:04 > 0:00:08Hi, I'm Ayshah and this is Newsround.
0:00:08 > 0:00:11Coming up: Bronze for Bolt in his final solo race.
0:00:11 > 0:00:14The world's biggest heart goes on display.
0:00:14 > 0:00:19And the little lamb who had a lucky break.
0:00:28 > 0:00:30Super sprinter Usain Bolt missed out on a gold medal
0:00:30 > 0:00:33in his last solo race at the World Championships
0:00:33 > 0:00:34last night.
0:00:34 > 0:00:38He was beaten by American Justin Gatlin who took the gold.
0:00:38 > 0:00:43As the race ended, Usain went to congratulate him on his win.
0:00:43 > 0:00:46It wasn't the end to Usain's career many were hoping for,
0:00:46 > 0:00:49but his position as a fantastic athlete is not in doubt.
0:00:49 > 0:00:50My start is killing me.
0:00:50 > 0:00:52It is just...
0:00:52 > 0:00:55Normally I would get better through the rounds,
0:00:55 > 0:00:59but it did not come together and that is what killed me.
0:00:59 > 0:01:02It did not come together and I knew that it did not come together,
0:01:02 > 0:01:05but I felt like it was there, do you know what I mean?
0:01:05 > 0:01:09The fact that I did not get it, that is the reason I lost,
0:01:09 > 0:01:11but it is just one of those things.
0:01:11 > 0:01:14Gold medal winner Justin Gatlin said it meant a lot to win the race.
0:01:14 > 0:01:17It is still an amazing night because it is Usain Bolt's last race.
0:01:17 > 0:01:20I've had so many victories and so many losses, and to be able
0:01:20 > 0:01:22to run against him throughout the years, you know,
0:01:22 > 0:01:26it is an amazing night.
0:01:26 > 0:01:28Staying with sport and he's already got an Olympic gold,
0:01:28 > 0:01:31and took another two gold medals at the World Swimming Championships,
0:01:31 > 0:01:33and now Adam Peaty has been answering your questions.
0:01:33 > 0:01:37Watch this.
0:01:46 > 0:01:47Hello, Issy.
0:01:47 > 0:01:50If I could do any other sport, I would probably do boxing
0:01:50 > 0:01:53because I love that sport, I love watching it when I am at home
0:01:53 > 0:01:57and it is something I have had a passion for from a young age.
0:01:57 > 0:01:58Hello, Adam.
0:01:58 > 0:02:00My question for you is how do you get a six-pack?
0:02:00 > 0:02:04A six-pack is a lot of ab work, but at the same time,
0:02:04 > 0:02:07a very, very good diet, no junk food at all, no crisps,
0:02:07 > 0:02:09no chocolate, no fizzy drinks.
0:02:16 > 0:02:24Before my race, I get ready, I just put my headphones in,
0:02:24 > 0:02:27a little bit of meditation, I like to be calm and relaxed
0:02:27 > 0:02:30and then I start to get a little bit up for it,
0:02:30 > 0:02:33take my caffeine, and hopefully get a little bit angry as well to get me
0:02:33 > 0:02:35out there and swimming fast.
0:02:35 > 0:02:37Rita from Woking asks, "How do you motivate yourself
0:02:37 > 0:02:40to keep training even when you're tired and you do not want to?"
0:02:40 > 0:02:43A great question, Rita.
0:02:43 > 0:02:46If you have that underlying motivation that is going to be
0:02:46 > 0:02:48stronger than anything else, you will pick yourself up those days
0:02:48 > 0:02:51that you do not want to and surround yourself with positive people,
0:02:51 > 0:02:54people that are on the same journey as you, and hopefully
0:02:54 > 0:02:55you will achieve those dreams.
0:02:55 > 0:02:58What did you want to be when you were growing up?
0:02:58 > 0:03:00When I was younger I wanted to be a Royal Marine.
0:03:00 > 0:03:03I wanted to be in the army from a very young age
0:03:03 > 0:03:06because I was obsessed by that kind of regiment and camaraderie,
0:03:06 > 0:03:08but then I found something that I was good at, swimming,
0:03:08 > 0:03:12and I am still getting that kind of camaraderie in the group as well.
0:03:12 > 0:03:16For now, I am just going to be a swimmer.
0:03:16 > 0:03:19Next, there are more than 11 million people in the UK with some
0:03:19 > 0:03:20form of hearing loss.
0:03:20 > 0:03:23These deaf children have been telling the BBC how they'd
0:03:23 > 0:03:25like hearing people to treat them.
0:04:29 > 0:04:29Thanks
0:04:29 > 0:04:29Thanks for
0:04:29 > 0:04:29Thanks for that
0:04:29 > 0:04:31Thanks for that advice.
0:04:31 > 0:04:33The world's largest heart has gone on display
0:04:33 > 0:04:35at Toronto's Royal Ontario Museum.
0:04:35 > 0:04:38It belonged to a blue whale whose body had washed up on a river bank
0:04:38 > 0:04:41in Canada three years ago.
0:04:41 > 0:04:46The organ is almost as big as a person, and would have weighed
0:04:46 > 0:04:48at least 181kg before it was removed.
0:04:48 > 0:04:50It's helping scientists understand more about the blue whale's body.
0:04:50 > 0:04:53The blue whale is the biggest species of animal that has ever
0:04:53 > 0:05:02lived on Earth, so bigger than any dinosaur.
0:05:02 > 0:05:04Most of the time, blue whale carcasses, they actually sink,
0:05:04 > 0:05:07because blue whales do not have as much fat or blubber
0:05:07 > 0:05:08as other species of whales.
0:05:08 > 0:05:11This is really the first and only blue whale heart.
0:05:11 > 0:05:13We are getting precise measurements that people were just sort of
0:05:13 > 0:05:17estimating before.
0:05:17 > 0:05:20To the 9-year-old boy who got in touch with Nasa about a job
0:05:20 > 0:05:21they recently posted.
0:05:21 > 0:05:31The space agency are looking for a planetary protection officer.
0:05:36 > 0:05:40In a letter, Jack from New Jersey in America said: "I may be nine,
0:05:40 > 0:05:42but I think I would be perfect for the job." While Jack
0:05:42 > 0:05:45didn't get the position, he did get a reply saying: "We hope
0:05:45 > 0:05:48to see you here at Nasa one of these days."
0:05:48 > 0:05:50Take a look at this lucky lamb who was rescued
0:05:50 > 0:05:51after hurting her leg.
0:05:51 > 0:05:55Lily the lamb was found shivering in a hedge near a farm last week.
0:05:55 > 0:05:57The farmer found her and adopted her and now she's moved
0:05:57 > 0:05:59in with the sheepdogs in the kitchen.
0:05:59 > 0:06:01That's all from me and the weekend team.
0:06:01 > 0:06:01Newsround's back tomorrow morning with Ricky from 7:40.
0:06:03 > 0:06:05This summer, why not earn your Blue Peter
0:06:05 > 0:06:07badges as part of our Big Badge Boat Bonanza?
0:06:10 > 0:06:11CHEERING
0:06:11 > 0:06:14You could send us some post...
0:06:14 > 0:06:15Review a show...