1月12日CNN聽力：環球股市迎來開門黑或面對崩盤 從科學角度探討似曾了解即視感
Checking in now with three of the schools watchingtoday and requesting a "Roll Call" mention atCNNStudentNews.com.
Rio Tierra Junior High is the Golden State of theCalifornia.
The Pioneers are there in the capital city ofSacramento.
To the Hoosier State, that's Indiana.
That's where we heard from Concord Community High School and the Minutemen of Elkhart.
And in Ontario, Canada, we're visiting St.Mary's today, and the students of St.Mary's DistrictCollegiate and Vocational Institute.
China's stock market took a beating on Monday.
It came after a report that showed Chinese manufacturing had decreased at the end of lastyear.
Stocks there fell so hard so fast that trading was stopped for the first time ever.
World markets are connected.
What happens in one major economy often affects another.
And the U.S. market followed suit, with the Dow Jones Industrial Average dropping 276 pointsyesterday.
The Dow is a group of 30 significant stocks.
It gives a sense of how the overall market is doing.
Yesterday was not its worst day ever-far from it.
And U.S. stocks could still rebound today.
But Monday was the market's first day of trading in 2016 and its worst opening day of the yearsince 2008.
This next segment is going to trigger some serious deja vu.
It's not because we've covered it before, but if some reason you think we have, you're probablyin the age range when people experience deja vu the most often.
Dr. Sanjay Gupta explores what it is exactly and the latest ideas from the medical communityabout why we experience it.
You know, I suddenly have this feeling that I've told you this before.
You know, it happens without warning, the strange feeling that you've been there, done that,even though you know you never have.
The French have a word for it deja vu, meaning already seen.
Now, while some claimed deja vu is a evidence of the paranormal such as past lives or alienabductions, other says we partially absorb scenes from television or movies to feel a sense offamiliarity.
It could be that our visual cortex is so fast at sending signals to our memory center, thehippocampus, that some believe the feeling of having seen it before is true, and it is true, butwe saw it just a split second earlier.
About two-thirds of us experience deja vu, and oddly enough, it seems to happen most oftenbetween the ages of 15 and 25.
So, it could be linked to the ongoing development of the brain.
Scientists aren't really sure.
Because deja vu occurs randomly among healthy people, it's been hard to study.
Now, we do know deja vu occurs in the medial temporal lobe, that's this area of the brain overhere.
That's where the rhinal cortex, the part of the brain that helps us recognize familiar, interactswith the hippocampus, that's the part of the brain that stores details of specific memories.
Perhaps signals there get crossed, could be that brain circuits convulsed in an almost sort ofseizure.
And actually, you know what?
That makes sense, because people with epilepsy do experience deja vu at the onset of theseizure.
So, it's now on epilepsy where most of today's research is underway.
In fact, neurologists have been able to trigger deja vu and people with epilepsy by stimulating,you guessed it, their medial temporal lobes.
You know, you can tell some people that something tastes disgusting and they just got to try itanyway for themselves.
This plant is kind of like that.
It's called titan arum, aka, the corpse flower.
It blooms for less than 48 hours, giving off an unparallel stink and then it collapses.
For some reason, folks lined up in droves to get a whiff, the natural nose-assaulting nastinessnotwithstanding.
This happened recently when a titan arum blossomed in South Australia.
You couldn't be bloomed to say the arum's aroma was titanically rotten.
But there are times not to follow the flow-er of the crowd, if no one knows when to hold theirnose when sniffing whiffs that reek, perhaps the proboscis suffers no losses when plugging itsprobing beak.
CNN STUDENT NEWS is planting more for tomorrow. Don't miss it.
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