0:00:04 > 0:00:05Hi, I'm Ricky and this is Newsround.
0:00:05 > 0:00:10Keep watching for all of this.
0:00:10 > 0:00:13With summer holidays on the horizon, we ask where you guys like to go.
0:00:13 > 0:00:14And way to glow!
0:00:14 > 0:00:19Find out what causes this amazing sight.
0:00:27 > 0:00:33First this morning, Liam Payne, Rita Ora, Stormzy and Leona Lewis -
0:00:33 > 0:00:42# Like a bridge over troubled water...#
0:00:43 > 0:00:46Just a few of the names who are helping to raise
0:00:46 > 0:00:49money for those affected by the Grenfell Tower fire
0:00:49 > 0:00:51which happened last week.
0:00:51 > 0:00:53The singers recorded Bridge Over Troubled Water
0:00:53 > 0:00:56to support victims' families.
0:00:56 > 0:00:59The song hit the number one spot on iTunes just two hours
0:00:59 > 0:01:01after it was released.
0:01:01 > 0:01:07The X Factor judge Simon Cowell organised the track.
0:01:07 > 0:01:09I was thinking at the time, raise some money, I also
0:01:09 > 0:01:11thought raise awareness, and I also thought
0:01:11 > 0:01:12raise some support.
0:01:12 > 0:01:15I wanted it to be something that, you know, weeks, months later,
0:01:15 > 0:01:19when you hear the record, you still remember what happened.
0:01:19 > 0:01:24Next, to something that looks like it's from out of this world -
0:01:24 > 0:01:25algae that glows in the dark.
0:01:25 > 0:01:26That's all I'm saying.
0:01:26 > 0:01:29Take a look.
0:01:29 > 0:01:37It's a rare sight, the ocean glowing in the dark.
0:01:37 > 0:01:39Yeah, a couple of salmon out the back jumping out.
0:01:39 > 0:01:41It was like fireworks sort of thing, the water.
0:01:41 > 0:01:42It was pretty cool.
0:01:42 > 0:01:48What you're looking at is Noctiluca scintillansmore, also
0:01:48 > 0:01:49known as sea sparkler.
0:01:49 > 0:01:51When you pick it up, it dribbles through your fingers.
0:01:51 > 0:01:53Whenever it lands on something, it glows.
0:01:53 > 0:01:55Just little splatters of bright glue, I suppose.
0:01:55 > 0:01:58The glow is caused by a natural chemical reaction with algae.
0:01:58 > 0:02:01When a boat drives through it or you put your hand through it,
0:02:01 > 0:02:03the chemical reaction is initiated, as a result of which,
0:02:03 > 0:02:08you get this emission of light.
0:02:08 > 0:02:14Algae are tiny living things that are found in water all the world.
0:02:14 > 0:02:17When the algae is touched, it changes colour from a dull pink
0:02:17 > 0:02:20to a bright electric blue.
0:02:20 > 0:02:23They are not observed as often in the colder waters off Australia
0:02:23 > 0:02:29but more in the sub tropical and warm temperate waters.
0:02:29 > 0:02:32This display was caught on camera at a beach in South Australia.
0:02:32 > 0:02:39The glow is completely harmless, but what a sight!
0:02:39 > 0:02:41Well, it's been pretty hot lately in the UK,
0:02:41 > 0:02:47with yesterday the hottest June day since 1976.
0:02:47 > 0:02:50Keeping cool can be quite tricky, especially for pets.
0:02:50 > 0:02:53Here's some advice on how to help your dog beat the heat.
0:02:53 > 0:02:54Hello, UK.
0:02:54 > 0:02:55It's Caesar Milan here.
0:02:55 > 0:02:56This is my friend, Eddie.
0:02:56 > 0:02:59We're in Singapore.
0:02:59 > 0:03:02We heard you guys have a heat wave right now in the UK,
0:03:02 > 0:03:05which is unusual, but we are going to give you some
0:03:05 > 0:03:08suggestions of what to do.
0:03:08 > 0:03:11Number one, make sure, when you go for a walk,
0:03:11 > 0:03:14it's early morning or late afternoon - that would be ideal for the dog.
0:03:14 > 0:03:16Dogs normally don't walk in the heat.
0:03:16 > 0:03:18Number two, bring water with you.
0:03:18 > 0:03:21Make sure you do short and sweet walks and always find a place
0:03:21 > 0:03:23where you can cool down.
0:03:23 > 0:03:28Number three, after you finish the walk, make sure you put nice,
0:03:28 > 0:03:29cool, compressed towels on his chest.
0:03:29 > 0:03:31Right?
0:03:31 > 0:03:32All right, UK.
0:03:32 > 0:03:42Have fun.
0:03:49 > 0:03:51It's getting nearer to the summer holidays.
0:03:51 > 0:03:54But when it comes to destination, do you prefer to visit somewhere
0:03:54 > 0:03:56you already know or go to somewhere new?
0:03:56 > 0:03:57Whitney has been investigating.
0:03:57 > 0:03:59So, everyone loves a new adventure once in a while, right?
0:03:59 > 0:04:02And with the summer holidays soon approaching, I think you're dreaming
0:04:02 > 0:04:05of that new and exciting destination you could possibly visit to create
0:04:05 > 0:04:06some amazing and wonderful memories.
0:04:06 > 0:04:07I know I am.
0:04:07 > 0:04:10But did you know that one guy believes it's less
0:04:10 > 0:04:12about where you go and more about where you go back to.
0:04:12 > 0:04:13Hi, there.
0:04:13 > 0:04:14I'm Oliver James.
0:04:14 > 0:04:17I'm a psychologist.
0:04:17 > 0:04:21I think, as a child, what you really want
0:04:21 > 0:04:24when you are small is predictability in your holiday destinations.
0:04:24 > 0:04:29Your parents may want to drag you around churches and art
0:04:29 > 0:04:31galleries, but is that what you really want?
0:04:31 > 0:04:34I don't think so.
0:04:34 > 0:04:37What you want is the same beach, the same hills, the same rivers,
0:04:37 > 0:04:39the same lakes, lots of nature.
0:04:39 > 0:04:42When you are ten, you really couldn't care less whether you are
0:04:42 > 0:04:43in France or England.
0:04:43 > 0:04:46Thanks, Dr James, but how many of you agree with his theory?
0:04:46 > 0:04:53I don't really agree with Dr James's statement.
0:04:53 > 0:04:55I've been to a few places on holiday.
0:04:55 > 0:04:56I've been to Wales, Cyprus.
0:04:56 > 0:04:59I've been quite a lot around Europe.
0:04:59 > 0:05:01I think it's best if you travel when you are younger
0:05:01 > 0:05:02and when you are older.
0:05:02 > 0:05:05I like going to the same place every year.
0:05:05 > 0:05:08I think it is nice to go somewhere new after a bit,
0:05:08 > 0:05:10but it's just relaxing to go to the same place,
0:05:10 > 0:05:11do the same thing.
0:05:11 > 0:05:14So, I've been going to Italy for the past two years,
0:05:14 > 0:05:17but before that, I've been going to Cyprus for nine years.
0:05:17 > 0:05:21My parents and my grandparents own a little caravan
0:05:21 > 0:05:24in North Wales and I've been going there since I was
0:05:24 > 0:05:26about three months old.
0:05:26 > 0:05:29I personally like going different places because it's good to get
0:05:29 > 0:05:35new experiences and enjoy going somewhere new.
0:05:35 > 0:05:43Well, whatever the case may be, as long as the sun's out, I'm happy.
0:05:47 > 0:05:51And we want to hear what you've got to say on this one - go online now.
0:05:51 > 0:05:52That's all from me.
0:05:52 > 0:05:54Leah's back with more from Newsround at 4.20pm this afternoon.
0:06:04 > 0:06:07Welcome, one and all. It's Thursday and we're having a ball.
0:06:07 > 0:06:09Eh? Someone's a poet and they know it.
0:06:09 > 0:06:11Do not underestimate my rhyming skills, Rhys.
0:06:11 > 0:06:13Eh, have a bit of this one.
0:06:13 > 0:06:15Coming up next is Little Roy.
0:06:15 > 0:06:17Don't you know he's a cartoon boy?
0:06:17 > 0:06:18Oooh!