A brand new continent has emerged
in the middle of the Pacific Ocean.
A process that would
typically take millions of years
happened overnight.
Our planet didn't always have
the continents you know and love.
Four billion years ago,
as tectonic plates underneath
the Earth’s surface slid around,
the land on their edges started to rise.
These scattered chunks collided
over billions of years
until they formed the first supercontinent,
called Rodinia.
Then the land continued to break apart and come back together.
Another supercontinent, Pangea, was formed.
And around 200 million years ago,
Pangea began to break apart
into the continents you know today.
All these changes happened over millions of years.
But if a new continent suddenly emerged in less than 24 hours,
how would this disrupt your day-to-day life?
You might be surprised to learn that
1,067 m (3,500 ft) under the South Pacific,
is the hidden continent of Zealandia.
Even though Zealandia isn't officially recognized
as an eighth continent,
it's nearly 70% as large as Australia
at 5.2 million square km (2 million square mi).
But only 6% of this continent sits above sea level.
For a new landmass to be considered a continent,
it would need to have a surface area similar to Zealandia.
And it would need to be a large,
continuous, discrete mass of land,
ideally separated by an expanse of water.
The Pacific Ocean has an average depth
of 4,000 m (13,000 ft).
So a significant volume of rock would need to be forced upward
to shape a new continent.
The plates in this region would shift and collide
with an incredible amount of violence.
There would be massive earthquakes
and volcanic eruptions as the land built up.
The sudden increase in land volume
would have a dramatic impact on the already rising sea levels.
Current estimates put the world on track for sea levels
to rise by 2.5 m (8.2 ft) by the year 2100.
This would only be a drop in the bucket compared
to what you would experience
if a new continent emerged overnight.
A continent with the surface area of Zealandia
would instantly make sea levels rise 40 m (131 ft).
Overnight.
Massive flooding would occur all over the globe.
And low-lying nations such as Bangladesh,
Senegal and the Netherlands would disappear.
And this would be just the beginning.
A new continent in the middle of the Pacific
would cause massive disruptions to the ocean’s currents.
These currents play an essential role
in driving our weather systems.
They store solar radiation and move heat
and moisture around the planet.
This would primarily impact
the North Pacific Subtropical Gyre.
This is the large system of swirling ocean currents.
One of the largest biomes on Earth,
it is home to many species of marine animals.
A new continent would disrupt the routes
many of these animals travel.
The formation of a new continent
would also have serious geopolitical ramifications.
Oceans are technically viewed as international zones.
That means no one country has jurisdiction over them.
If a continent appeared within 22 km (13.6 mi)
of a country’s coastline,
that country could make a legitimate claim to ownership.
But with all the tectonic violence needed to create this land,
most countries would probably not want any part of it.
But if this new continent emerged
in the middle of the Pacific Ocean,
it would be more challenging to decide who owns it.
There would be a huge international debate
that could create high tension among powerful nations.
The United Nations,
the essential governing body over the oceans,
would have to oversee this significant political event.
If you were looking to move to this very new land,
it would need to be habitable first.
The continent would emerge from the sea completely barren.
It would be all rock
with no soil and no source of freshwater.
It could become a popular tourism area
or even a radical solution for storing toxic waste.
We live in a highly connected world,
where even small, incremental changes
can lead to disaster.
The formation of a continent this big
would be devastating for us
and the Earth's ecosystems.
You know, maybe we'd be better off
if the supercontinent Pangea never broke apart.
But that’s a story
for another WHAT IF.