The Earth
Terra, Gaia, the Third Rock from the Sun.
This planet has been our home for all of human history and Beyond, yet
there's still much we don't understand about our insignificant pale blue dot.
Where did life begin?
When will disaster strike and who thought of the name?
Here are seven things we don't know about Earth
in at number 7 how it works
Plate tectonics is the accepted theory that Earth's crust and upper mantle is made of large fragments which glide over the rest of the mantle
Collectively forming a shell to protect us from a fiery death
2,800 kilometers, beneath our feet, but as for what's below that we're still [working] that out
Seismic studies show our outer core is liquid and our inner core is solid and that there probably about 80% iron
But we don't know the chemical composition of the rocks and our mantle
We don't know what processes caused plate tectonics, and we don't know for certain. Why Earth has a magnetic field
We have some good ideas, but these are all based on Satellite scans and mathematical models
And we can't really dig down there to look since the deepest hole ever dug by humans is Russia's Kola Super-deep borehole
at Twelve point three kilometers
Interestingly a lot of what we do know about Earth's seismological activity can be attributed to the development of Nuclear weapons
During the cold war seismological research was heavily funded to help detect Nuclear
Detonations which means all those [no] new [hippies] were holding humanity back and Kim jong IL was just a keen geologist all along
in
[AT-6]
sedimentary my Dear Watson
By analyzing sedimentary and volcanic rocks we can track changes in the Earth's Magnetic [field]
Throughout our [planet's] history and in doing so we've noticed some rather strange anomalies
One of which is occurring right now on
Several occasions the Earth's Magnetic field has reversed only to then revert back and stay that way for as long as [ten] million years
data released in may by the European space Agency
also
Showed Earth's magnetic poles are weakening at a much faster rate than previously thought and that we could be heading for another magnetic
reversal in our near future
The last time this happened was in the stone age
And we don't know whether it's caused by events in our core or tectonic plate movements
But don't worry because if it happens the worst thing magnetic reversal will cause is the obsolescence of everyone's come
Which is great news if you own a compass factory
In at five where and how did life begin?
The theory that anatomically modern humans originated in Africa
[250,000] years ago before dispersing to the rest of the world is well known and widely accepted
But what about before that?
where did Earth's earliest forms of life first begin to flourish the
[primordial] soup theory states that chemicals slopped together in the Earth's oceans may have provided the building blocks necessary
For life to get its ass in gear the energy to kick things off could have then come from lightning as the Miller-urey
Experiment from 1953 showed that electric Sparks can generate amino acids and sugars from an atmosphere similar to that of early [Earth]
alternatively life may have begun
Deep Within clay [or] Ocean ice at the bottom of the sea around hydrothermal vents or Via?
Panspermia where life forms from a habitable planet are transported via meteorites and asteroids
So nobody has yet pinpointed how and where life began?
But since it's likely we started underground in the ocean or on another planet. I guess you could say we're all fish moles or Martians
number four when will disaster strike
The prediction of Earthquake activity and volcanic eruption has improved significantly over the past century
But there are still many things we don't know about these devastating natural disasters
Which would really help us prepare for them in [the] future, and that would mean we could quit making cheap-ass disaster movies
[we're] Morgan Freeman always seems to be president
Perhaps if we understand the behaviors going on in the Earth's core and Mantle
We may be better equipped to figure out how faults form to cause earthquakes and what Subterranean mechanisms are at play to cause the magma
accumulation which leads to volcanic eruptions
America in particular needs these developments to happen pretty soon
Because with both the yellowstone Caldera and the San [Andreas] [fault] lines seemingly overdue for some activity
It's only a matter of time before something of note happens there and all the Morgan Freeman's in the world won't save us then
at [three] who picked the name
It's a good job classy civilizations from antiquity were the ones who named our solar [systems] planets mars was the roman. God of war
Jupiter the Roman. God of sky and uranus the Greek. God of heavens
[what] if they were all named today?
We'd call them planet McPlantz face [Rini] ring [ursin] and we'd probably keep uranus because it's funny, but what about Earth who chose [that] name?
[well], we can trace the word Earth back to an [old] English noun Eartha
There is no known origin for the application of this term in reference to the entire [world] [although]
[it] is generally [accepted] [that] Earth started to move from a description of dirt to a formal title around the formation of early Modern English
in the late 15th century
at - where's our ice age at
If any 20th [century] [Fox--] producers are watching this we're not referring to those Ray Romano movies
You keep making you've done [5] already guys. That's enough
It's time for the [ice] [age] to end sid manny to go extinct and their corpses to start rotting into mush
No
We are of course talking about the periods of extremely cold climate which can last for millions of years
plunging Earth into a perpetual winter
There have been five major ice ages in Earth's history and within the present one the pliocene quarternary glaciation
cycles of ice sheets have been advancing and retreating for between
40,000 and a hundred thousand years at a time in what's called a glacial period These temperature drops are caused by fluctuations
in Earth's orbit called
Milankovitch cycles and guess what our next glacial period Is way overdue
Oh no, Al oprah not snowman pregnant
We currently reside in an interglacial period of 11,000 years and typically these [lasts] for about 10,000 to 12,000 years
so at most
We should have about a thousand years left before the world gets Cooler
And what's cooler than being cool ice cold of course as andre 3000 famously posited in his?
2003 thesis, [Haiya]
But shockingly just last year
Nasa published a study showing antarctica was gaining more ice than it was losing and with global warming [rize] nobody knows why this might be?
Mathematics professor Valentina's are cova believes it is related to solar cycles and using a model based on solar observations
From the Royal astronomical Society which she claims as 97% accurate she predicts
We're heading for a mini ice age in as little as 15 years
And at number one how hot will it get?
Far Likelier than a sudden ice age is an extreme global heat crisis because today around
97% of climate scientists Agree
Climate change is occurring and 82% believe it is likely caused by the activities of man
But if you disagree with them that's fine everyone's entitled to their opinion however
You will be forced to go sit in a [special] corner with Bobby Ray Simmons to discuss flat Earth
Theories, and how the moon is made of cheese?
climate change denial occurs
Because many efforts to counteract it aren't beneficial to big business and data is often twisted to fit the agendas of major
Corporations remember the NaSa report on Antarctica gaining sea ice that's true
But it's actually losing land ice because of global warming which many climate change deniers
Conveniently ignore we know that industrial ranching deforestation and fossil fuel use are three of the main causes of our atmosphere?
Trapping heat but exactly how hotter it will get in the future is something we cannot predict
various [Modelling] studies suggest an increase between two point seven and
Nineteen point eight degrees Fahrenheit over the next century
but with Arctic sea ice shrinking sea levels rising and the Earth breaking temperatures
Every year the effects of climate change are obvious even [if] the exact gauge on the thermometer is not
So that's our list of things we don't know about [Earth]
Are you hankering for a few more delicious unanswered questions?
then watch our recent video on seven unexplained human conditions
Which with hindsight should have included how people can be stupid enough to believe in flat Earth theories?