[INTRO ♪]
On September 14, 2005, there was an earthquake in a remote part of Afar, a region in northern Ethiopia.
It wasn't very strong, but it was the first of many.
Over the next 12 days, there were over a hundred more quakes, most of them also relatively small.
Then, on September 26, a nearby volcano called Dabbahu erupted.
This was its first eruption in recorded history, and it came from a flat part of the volcano a few kilometers from the summit.
The eruption didn't do too much harm—no people were seriously hurt, and at most it killed a couple hundred goats and camels.
But it opened up a gigantic crack in the earth, which grew to 60 kilometers long and as much as eight meters wide—in only ten days.
And as you can probably imagine, this caught the attention of geologists around the world.
It turns out that as dramatic as it was, the crack was just one of the latest symptoms of an ongoing seismic shake-up in Africa that's eventually going rip the continent in two, leading to the creation of a brand-new ocean.
Right now, eastern Africa is going through a process called rifting, where the tectonic plates that make up the Earth's crust and upper mantle pull apart from each other.
A giant plume of magma rising from deep inside the mantle is forcing the African and Arabian plates away from one another, forming a rupture in the Earth's surface.
The result is the Great Rift Valley, which stretches more than 3000 kilometers through the eastern part of the continent.
Scientists have been studying the Great Rift Valley since around the turn of the 20th century, when an English geologist named John Gregory encountered it for the first time.
Even though the theory of plate tectonics wouldn't be fully accepted for another 50 years or so, he realized how important it might be.
The valley is a system of several fractures that began forming at different times, and it's home to lots of seismic activity.
The pressure from tons of magma bubbling up is what leads to earthquakes and volcanic eruptions like what happened in 2005.
For a study published in 2018, scientists installed two seismic networks in Ethiopia and Eritrea.
And these networks of seismographs recorded almost 5,000 earthquakes of at least magnitude 2.0 in two years.
All that activity has spawned other volcanoes, too—one, called Nyamuragira, erupted fifteen times between 1894 and 1979.
What's happening in eastern Africa is actually more common at the bottom of the ocean, where magma bubbling up into tectonic rifts forms features called seafloor ridges and helps drive the movement of continental plates.
But the activity in Africa is giving geologists a chance to study the process up close—no submarines needed.
As it turns out, what happened in 2005 was that a huge length of the rift cracked open all at once, beginning with the volcanic eruption and spreading in both directions from there.
This was a bit of a surprise to scientists, who previously thought that such cracks—on the ocean floor as well as on land—only broke open a little bit at a time.
Eventually, the Horn of Africa is going to split off from the rest of the continental plate and go its own way.
Large areas of the Great Rift valley are below sea level, cut off from the ocean only by a small piece of higher land in Eritrea.
So when the split finally happens, seawater is going to come flooding into the rift, turning the Horn of Africa into an island and creating a new ocean.
Odds are none of us will actually get to see the new ocean.
The process has been happening slowly for about 30 million years, and the rift is only widening at an average rate of a couple of centimeters a year.
So, it will probably be tens of millions of years before traveling from Sudan to Somalia requires a boat.
But in the meantime, we get to watch our planet reshape itself, giving us a teaser for what the world will look like long after we're gone.
Thanks for watching this episode of SciShow, and a special thanks to our President of Space, Matthew Brant!
Thanks, Matthew, for your support!
And if you want to help support us or just get some cool rewards like access to our monthly livestream, head on over to patreon.com/scishow.
[OUTRO ♪]
For more infomation >> The World's Next Ocean - Duration: 3:42.-------------------------------------------
Even Fox News says GOP's handling of Kavanaugh hearing is a 'disaster' - Duration: 3:00.
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Audi Q8 50 TDI Quattro 286PK Tiptronic - Duration: 1:09.
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Testing Bulletproof Backpack Insert from Man-PACK - Does it Work? - Duration: 2:02.
♪ OPENING MUSIC ♪
LET'S SPEND A LITTLE BIT OF TIME
TALKING ABOUT
BALLISTIC OR BULLET-RESISTANT
BACKPACKS
NOW THIS BACKPACK RIGHT HERE
IS THE TEAM HONEY BADGER BACKPACK
THAT WE SELL ON OUR
STUDENT OF THE GUN GEAR STORE
NOW THE BACKPACK ITSELF
IS NOT BULLET-RESISTANT
OR BALLISTIC, BUT
WHAT DO WE HAVE RIGHT HERE
WELL, THERE'S A POUCH
RIGHT IN THE BACK
THAT WAS DESIGNED INITIALLY
FOR PROBABLY AN IPAD
OR TABLETS OR WHATEVER
WELL, WHAT CAN WE PUT IN THERE
WE CAN PUT THIS
BALLISTIC INSERT
* KNOCK, KNOCK *
IT'S A HARD BALLISTIC INSERT
FROM MAN-PACK
NOW THIS IS 10 BY 13
AND IT'S RATED FOR NIJ
LEVEL 3A AS FAR AS
BODY ARMOR'S CONCERNED
AND 3A IS DESIGNED
TO STOP POWERFUL HANDGUNS
BUT NOT RIFLES
SO WHAT WE'RE GOING TO DO TODAY
HERE ON THE RANGE
IS WE'RE GOING TO ZIP THIS UP
AND WE'RE GOING TO TEST THIS
BALLISTIC PANEL
AGAINST REAL BULLETS
FIRST ROUND RIGHT HERE
SECOND ROUND RIGHT HERE
SEE WHERE THEY PASSED
THROUGH THE PADDING
RIGHT HERE AND RIGHT HERE
THE BULLETS ARE ABSORBED
INSIDE OF THE PANEL
THE BULLETS DID NOT PASS THROUGH
THE BACKSIDE OF THE PANEL
THEY WERE ABSORBED INSIDE OF
THE PANEL
THIS IS THE BALLISTIC INSERT
FROM MAN-PACK
AVAILABLE ON
STUDENTOFTHEGUNGEAR.COM
THE AMMUNITION THAT WE
USED FOR THE TEST
WAS THE U.S. MILITARY
M 882 THAT'S 124 GRAIN
FULL METAL JACKET BULLET
GOING +P VELOCITY
-------------------------------------------
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Testing Bulletproof Backpack Insert from Man-PACK - Does it Work? - Duration: 2:02.♪ OPENING MUSIC ♪
LET'S SPEND A LITTLE BIT OF TIME
TALKING ABOUT
BALLISTIC OR BULLET-RESISTANT
BACKPACKS
NOW THIS BACKPACK RIGHT HERE
IS THE TEAM HONEY BADGER BACKPACK
THAT WE SELL ON OUR
STUDENT OF THE GUN GEAR STORE
NOW THE BACKPACK ITSELF
IS NOT BULLET-RESISTANT
OR BALLISTIC, BUT
WHAT DO WE HAVE RIGHT HERE
WELL, THERE'S A POUCH
RIGHT IN THE BACK
THAT WAS DESIGNED INITIALLY
FOR PROBABLY AN IPAD
OR TABLETS OR WHATEVER
WELL, WHAT CAN WE PUT IN THERE
WE CAN PUT THIS
BALLISTIC INSERT
* KNOCK, KNOCK *
IT'S A HARD BALLISTIC INSERT
FROM MAN-PACK
NOW THIS IS 10 BY 13
AND IT'S RATED FOR NIJ
LEVEL 3A AS FAR AS
BODY ARMOR'S CONCERNED
AND 3A IS DESIGNED
TO STOP POWERFUL HANDGUNS
BUT NOT RIFLES
SO WHAT WE'RE GOING TO DO TODAY
HERE ON THE RANGE
IS WE'RE GOING TO ZIP THIS UP
AND WE'RE GOING TO TEST THIS
BALLISTIC PANEL
AGAINST REAL BULLETS
FIRST ROUND RIGHT HERE
SECOND ROUND RIGHT HERE
SEE WHERE THEY PASSED
THROUGH THE PADDING
RIGHT HERE AND RIGHT HERE
THE BULLETS ARE ABSORBED
INSIDE OF THE PANEL
THE BULLETS DID NOT PASS THROUGH
THE BACKSIDE OF THE PANEL
THEY WERE ABSORBED INSIDE OF
THE PANEL
THIS IS THE BALLISTIC INSERT
FROM MAN-PACK
AVAILABLE ON
STUDENTOFTHEGUNGEAR.COM
THE AMMUNITION THAT WE
USED FOR THE TEST
WAS THE U.S. MILITARY
M 882 THAT'S 124 GRAIN
FULL METAL JACKET BULLET
GOING +P VELOCITY
-------------------------------------------
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Choirs In Perfect Harmony - Duration: 2:00.
I never had any choral training. I've participated in singing groups here and there
but none of them really professionally run like here.
I joined the chapel singers, I was really missing, like, an element of music.
I came to Trinity College and wanted to get involved with music
but I also wanted to get involved in the chapel community
so this is very much the intermingling of the the two that I really felt at home with.
Having a group on campus and a great community of really talented people who are really fun to work with
who I can sing with and make music with every week is just such a gift.
To work with the Trinity Chapel Choir and the St. James choir is really great.
We were recording a piece by Philip J. Stopford that was commissioned just for us specifically,
called 'Psalm 150'.
We commissioned the work to commemorate the passing of one of our founders, Mr. Spicer.
Any time that we have the opportunity to collaborate with the communities around us
everyone jumps at that opportunity.
I love singing together with people and it's just like a feeling that we are all one.
To finally record something that's professional,
that's real, together in the space, is such a big deal for us and it's really exciting.
It's important that the students make links to the community
and the community connects with the college.
It's great to be part of one of the oldest groups on campus
but to also be creating something entirely new and different.
And it was especially neat to know that, that piece hadn't been sung before and as we sang it
it was truly coming to life.
It was definitely magical to kind of have that experience
of just something totally new and something for you.
-------------------------------------------
Mobile Alliance l Garena l Violet shooter climbing team pkg l NTD Vlog - Duration: 11:58.
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[FREE DL] Afrobeat Instrumental x Dancehall - Good Bye | Afro Pop Type Beat - Duration: 3:29.
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