26/06/2012 Newsround

Hi guys. It's girl power on Newsround this afternoon. Hayley

and Nel here with all the day's top stories. Here's what's coming up.

Switch off, or standby? We've been on an energy saving challenge. And

it's my most dangerous mission yet for Newsround - swimming with

sharks! But first to Northern Ireland, where the Queen's started

a two-day visit as part of her Diamond Jubilee celebrations. But

this trip is very different from the other parts of her Jubilee tour.

That's because over the years there's been a lot of violence

there, as people are divided about whether to stay part of the UK or

join the Republic of Ireland. This visit is one of the first in 40

years by the Queen, that hasn't been kept a secret and many hope it

will show just how far the peace process in Northern Ireland has

come. This visit isn't about the past. How can you forget the past,

but no-one will. It's about the future. The good thing about this

crowd, people here, five, six, seven, eight, nine years of age.

They've only known the good days in Northern Ireland. We don't have

total peace yet, but dare I say it, this looks like a scene you could

see in most parts of the UK today. Crowds have lined the streets and

Union flags are everywhere to be seen. The Queen has visited

Northern Ireland 19 times during her reign, but she hasn't always

been made to feel this welcome. For years, violent clashes there

between two main groups of people, have led to a lot of problems.

Unionists wanted Northern Ireland to stay part of the UK and be ruled

by the Royal Family. Nationalists wanted the area to join the rest of

Ireland, the Republic. For years, armed groups on both sides held

violent campaigns. There were bomb attacks in Northern Ireland and in

Britain. Many people died in the conflict which became known as The

Troubles. All this made it a very dangerous place for the Queen to

visit. For years details of her visits were kept top secret. In her

Silver Jubilee, she couldn't stay overnight, and no one was allowed

to know where and when she was arriving. Earlier on, the Queen

arrived by helicopter to a church in Enniskillen, a town where 12

people were killed by a bomb during the height of the violence. And

lots of eyes will be on her tomorrow when she'll meet Martin

McGuinness, the former leader of a terrorist group called the

Provisional IRA, who were responsible for that attack and

another which killed Prince Philip's uncle. He's now Northern

Ireland's Deputy First Minister. Despite the celebrations taking

place in many parts of the country, there have still been some protests

by people unhappy at the Queen's visit. On the whole though this is

seen as a ground-breaking trip that is hoped will mark the start of a

new Northern Ireland. Now to a massive stroke of luck for two guys

in Jersey and their metal detectors. They've found one of Europe's

largest ever hoards of old coins. They're more than 2,000 years old

and thought to be worth around �10 million. Archaeologists say there

could be about 50,000 in all. It'll take months to sort through them

properly. Now, you've been on the Newsround website today, telling us

how you save energy. It's after a report found that by leaving things

like TVs and mobiles on standby instead of switching them off, we

waste enough energy in a year to run two power stations for 12 whole

months! Your comments in a sec guys, first though, watch this. You get

home from a long day at school, kick off your shoes, turn on the tv,

maybe you're laptop too and text your mates on your phone while it's

charging. But when you're done, do you actually turn them off? Knell!

Nell! As a country we're now using a lot more energy than before, but

what makes it worse is that a lot of it is wasted. It's because lots

of us aren't turning off stuff tvs and laptops properly, but just

leaving them plugged in or on sleep mode. Lots of people reckon that

leaving stuff on standby or sleep mode means that it stops using

electricity, but it doesn't. Some experts reckoned that the amount of

electricity wasted by leaving gadgets in standby or sleep mode

would be enough to keep two power stations going for a year. Things

like not unplugging your mobile or laptop when its fully charged waste

electricity. And overcharging some gadgets like smart phones can

actually damage their battery life in the long run. A group that looks

into how we can save more energy say that the amount of energy each

family wastes by leaving stuff on standby is the same amount needed

to power their tv, DVD player, set- top box, hi-fi and radio for 12

months. Over the next few years it's going to become harder to

power Britain, so the Energy Savings Trust want to work with the

Government to make us more energy smart. On the Newsround website,

Maika from Bognor Regis says, "My family and I save electricity by

not using too many lights and remembering to turn them off. Not

only does it save energy it saves money." And Abby got in touch all

the way from Hong Kong. She's got a top tip. "My family have reminder

notes on everything so when you leave a device on, you see the

reminder and you remember to switch it off." Last word from Kaleb in

Merseyside who says, "The way I save electricity is instead of

watching TV, I read for two hours." Hope you're watching now, Kaleb.

Someone who'll be wanting to save up all his energy is Andy Murray,

who's making his first Wimbledon appearance of the year a bit later

on. Could be a tough match. He'll play the former world number three

Nikolay Davydenko from Russia. Former Wimbledon champion, Rafa

Nadal, is playing now on Centre Court. He's two sets up against

Thomaz Bellucci. I've done some pretty daring stuff for Newsround.

I've rescued lions and been pulled on a sledge by husky dogs. But

nothing quite beats swimming with sharks. I'm so jealous. It wasn't

just for fun though.. Hayley was on a mission to find sharks teeth to

see what they tell us about ancient breeds of the species. This is

Blackpool Sea Life Centre and there are five different species of

sharks, including this eight-foot large one and in a few moments I'll

be getting in there to collect their teeth. Experts here are

working with the University of Birmingham to find out more about

sharks that lived thousands of years ago, by collecting their

teeth and today I'm giving them a helping hand. Here we go. To do

that, I've got to get in at the deep end. The tank is ten-feet deep

and with 15 sharks in there, one nearly nine-foot long, well, I was

nervous, but I didn't have to go near their mouths. They lose their

teeth naturally, so I just collect them. There you go. It was quite

scary, but I've managed to find some shark teeth and I'm glad to be

getting out of here. This is one of the teeth I've collected today.

What sort of information can this tell you? We look at the chemistry

and it can reflect the food and nutrition which sharks take. This

is a prehistoric tooth and if you compare that one to the one I've

got today you can find out the differences between the environment.

Exactly. How warm the water was, what was the climate life millions

of years ago. The tooth will hopefully help scientists get

closer to sharks that were around thousands of years ago, but

considering their had teeth this big, well, I think I got close

enough today already. That's it. Look at this egg roulette. One