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  • Welcome to February, a 29 day month in this leap year.

  • For CNN Student News, I'm Carl Azuz,

  • hope your weeks off to a good start. First up, we're headed out to sea.

  • The Pacific Ocean, a crucial route of trade between Asia and North America.

  • Though Canada is said to be the top trading partner of the US,

  • that's when you combine imports and exports.

  • And China is right behind in total trade.

  • The Asian country is the one nation from which the US imports the most.

  • There's a containership that's ferrying goods between the two countries.

  • It's massive. The Port of Oakland in California had to spend

  • millions of dollars getting it's shipyard in shape to accommodate it.

  • And CNN's Matt Rivers got to step aboard.

  • He shows us how this ship is symbolic in the trade

  • relationship between the US and China.

  • It's longer than the Eiffel Tower. It's got an 80, 000 horse power engine,

  • and weighs up to 240, 000 tons.

  • And yet thanks to the magic of buoyancy, the Benjamin Franklin floats.

  • It's leaving China soon heading for Los Angeles.

  • This is the largest container ship that has ever docked in the US.

  • Being on board you really get a sense of scale,

  • mainly because of how small you feel.

  • But for a transport ship like this one,

  • the most important figure is how much it can hold.

  • The Benjamin Franklin can take on 18, 000 containers.

  • Placed end to end, they would stretch 68 miles.

  • Often on the other side of doors like these are things like electronics,

  • toys, clothes, consumer goods made in China that will sell in American stores.

  • This is what trade between the two countries looks like.

  • And far more stuff is exported from China to the US,

  • than the other way around, a difference of hundreds of billions of dollars.

  • That imbalance has been a source of conflict for some time.

  • In the middle of a US presidential race, it makes for easy fodder.

  • US China trade is incredibly intertwined

  • and the next US president will have some ability to influence those ties.

  • And that will impact people's lives on both sides of the Pacific.

  • Which is why we're talking about US politicians in Iowa

  • while we're thousands of miles away on this giant ship in the South China Sea.

  • Matt Rivers, CNN, off the coast of Southern China.

  • On the ground in Iowa, the caucuses are happening as you watch this.

  • The reason why Democrats and Republicans have been feverishly campaigning there,

  • it's the first contest of the US presidential election process.

  • What voters are doing in Iowa is deciding which Republican

  • and which Democrat they support the most.

  • The candidate from each party who wins in Iowa

  • is one step closer to winning his or her party's nomination for president.

  • But the Iowa caucuses alone don't guarantee who will win,

  • the process plays out over all 50 states.

  • So why is there so much attention on Iowa? Mit Romney 23 %.

  • The purple is Rick Santorum, you see the impressive nature.

  • Barak Obama, the senator from Illinois, the junior senator from Illinois,

  • has won the Iowa caucuses. Every four years

  • we hear all about the Iowa caucuses.

  • It's a huge deal, it's all over the news. But what does it actually mean to win?

  • Probably not what you think. On the night of the caucuses,

  • Iowa officials from both parties count the votes

  • and announce to the media who got the most.

  • And we report that they won. Yes. Yes, very good. Third times a charm.

  • Third times is a charm. Excellent flicking.

  • But it's important to know what winning really means.

  • You might assume that the person that wins the Iowa caucuses

  • gets the most delegates at the convention. Not so.

  • Iowa caucuses are really just a straw poll,

  • they have no bearing on delegate selection.

  • By the time the Iowa parties actually select their delegates,

  • it's much later in the process.

  • Sometimes the whole primaries are already over,

  • so why do we care so much? There is actually a reason.

  • The Iowa caucuses are the first electoral contest on the calendar,

  • so it give us an initial look at the state of the race.

  • And winning first is a great place to start.

  • There is some controversy though.

  • Despite all the attention the caucuses receive,

  • not a lot of Iowans actually participate, and I think there's a reason for that.

  • Caucusing actually takes several hours,

  • and they're usually held after work hours.

  • But what about the people that can't make it to the caucus?

  • Well, they can't participate. Working a shift on caucus night, can't caucus.

  • Disabled, can't leave the house, can't caucus.

  • Just kinda lazy and don't want to leave the house cuz it's freezing

  • in Iowa in the middle of winter, can't be blamed, also can't caucus though.

  • As supporters say that the process is there,

  • because it's a community event.

  • It's people in your small town talking about politics, and really engaging.

  • And in that sense, it's pretty cool.

  • But now, when you're watching the caucus results in February,

  • you'll really know what we mean when we say a candidate has won.

  • Scientists at the University of California, Los Angeles,

  • say they have a new theory about the Moon,

  • or at least a new idea about an old theory.

  • The theory, that other scientists have debated,

  • is that another planet smashed into Earth 4. 5 billion years ago, give or take.

  • But many believe this was a glancing collision, one at an angle.

  • The University of California researchers compared rocks brought

  • back from the moon missions to rocks from Hawaii and Arizona.

  • They found similar chemical structures in the oxygen of the rocks.

  • So they think that the theoretical collision between the other planet

  • and Earth was head on, that that's the reason why there are similarities

  • between earth rocks and moon rocks.

  • And that though the other planet didn't survive the collision, it did become our moon.

  • Of course, there's plenty of room for doubt, regardless,

  • we remain confident it's not made of cheese.

  • Our three daily roll call schools are chosen from one place.

  • Each days transcript page at cnnstudentnews. com.

  • Dennis Yarmouth Regional High School is first up.

  • The Dolphins of South Yarmouth, Massachusetts are watching.

  • They made a request on Friday's transcript.

  • So did Bella Vista Middle School.

  • The Silver Hawks are soaring high over the Golden State.

  • They're in the city Murrieta, California.

  • And in Sao Paulo, Brazil, we're happy you're watching the show

  • and that it's helping you learn English at Escola Morumbi.

  • Let's talk about your brain. It's amazing.

  • Your temporal lobe on the side of your brain

  • is believed to be involved in hearing.

  • Your parietal lobe on the top and back part of your head,

  • helps you identify touch, taste, and temperature.

  • And the cerebellum, the lower part by your spinal cord,

  • is involved in movement, balance, and coordination.

  • What they all have in common, besides being parts of the same organ,

  • is that they're lit up by music.

  • We all have that song we just can't get out of our heads,

  • no matter how hard we try. It's called an earworm,

  • and it's just one example of the extraordinary power of music.

  • The thing that's so interesting about music

  • is just how much of the brain it activates.

  • Beyond the auditory cortex, the part of the brain that processes sound,

  • music lights up part of your brain that is involved with movement,

  • attention, planning, and memory.

  • Speaking the words, for example, comes from over here, the left temporal lobe.

  • Putting them into a tune comes from over here, the right parietal lobe.

  • And then putting it all into a rhythm from here, the cerebellum.

  • There are so many neuro- networks involved in music processing,

  • it elicits what is know as the amplifier effect.

  • It's no longer just music, it's an emotional response,

  • and that's what makes it stick.

  • Studies have shown that kids who take music lessons,

  • didn't just get better at playing an instrument,

  • their brains processed language better.

  • Another recent study looked at patients who were about to undergo surgery.

  • People were either given music or an anti- anxiety drug.

  • All right, guess what happened? The people who listened to music

  • had less anxiety and lower levels of the stress hormone cortisol

  • than people who took drugs. And it can be even bigger than that.

  • You see, music can unite our brains, but it can also unite the masses.

  • We will willingly thrust ourselves into a crowd of 20, 000 people,

  • and excite every aspect of our brain for music.

  • Organized drone racing has flown into our world.

  • And though it looks like special effects, this is real.

  • These quadcopter drones are zipping through Sun Life Stadium in Miami, Florida.

  • They have onboard cameras that allow competitors

  • to see where the drones are going, using virtual reality headsets.

  • Yes, it's higher tech than the Wright Flyer.

  • These things can go 80 miles per hour.

  • And while you don't see it here, they do wreck,

  • hard, often smashing into bits.

  • Racing's reportedly safe for the people involved,

  • assuming they don't get hit. But it's not cheap.

  • An entry level drone without the VR headset starts at 140 bucks.

  • But I bet those speeds really give them an adronaline rush.

  • It's really a sport for control freaks, where remotions run high,

  • you've got to have your headset on straight.

  • You gotta give them props, because the reality is that they're unafraid

  • of the virtual or the in- virtual. I'm Carlos Azuz, and I'm drone for the day.

  • CNN Student News is back tomorrow.

Welcome to February, a 29 day month in this leap year.

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