Hello space cats and welcome back to my
channel. I want to introduce you to the
Flat Earth Society their Twitter page
boasts over 85 thousand followers which
means at least 85 thousand people
believe that the earth is really flat
but is it really and if it's not flat
then why do so many people think it is
In this week's video I'm gonna be
explaining all of this and more
The most favored Flat Earth theory is
that the earth is a disc surrounded by
an ice wall their main reasoning being
that the earth looks flat and the bottom
of clouds are flat - even though the
members of the Flat Earth Society
generally believe in scientific evidence
they also have a huge grudge against a
scientists they often carry out their
own scientific experiments to try and
help prove their point however a lot of
the times they fail including the
daredevil Mike Hughes who has had
several attempts of using homemade
rockets to blast himself into space in
attempts to see the curvature of the
earth for himself the Flat Earth
Convention which attracts hundreds of
people every year is a place for
like-minded people to discuss what they
think the real shape of the earth is and
why they believe it's covered up these
conspiracy theorists are also the
typical type that don't believe in
gravity or the moon landings several
celebrities have also been vocal about
being flat earthers including the singer
B.o.B and the former England cricketer
Freddie Flintoff. Hundreds of people have
been into space they've seen the
curvature of the earth with their own
eyes and not one of them has announced
that the earth is flat. You would have
thought that if it were true at least one of
them would have cracked by now but
according to flat earthers this is
because the space agencies of the world
are involved in a conspiracy faking
space travel and exploration that
started back during the space races of
the Cold War but if that were the case
and how do we explain things like this
and this and this
well photographic evidence can easily be
altered and apparently all camera lenses
have some inherent lens curvature on the
Flat Earth Society page they provide
several evidences of flat earth so
let's debunk them. Firstly there's an
explanation of how the day and night
cycle would work for a Flat Earth except
we know that the Sun is spherical so why
would it radiate like an ellipse
secondly for a Flat Earth theory to work
you require a magnetic monopole and they
explain this away with radial magnets
however radial magnets have to have a
large enough inner diameter to be stable
which would mean that as you approach
the North Pole all of a sudden your
compass would start to point North
instead of South which does not happen
we also know that the planets and the
Sun around so the flat earthers States
say that Earth can still be flat because
the planets orbit around the Earth if
this were the case however there would
be no simple way to explain away the
movements of planets on the sky
according to flat earthers gravity does
not pull the earth into a sphere because
gravity is much weaker than we're taught
what's really happening is dark energy
is accelerating the earth upwards at the
same rate as gravity and whilst this
conforms with Einsteins equivalence
principle there is no reason why this
acceleration would be perfectly
perpendicular to the plane of the Flat
Earth we know that the earth is round
and there's plenty of scientific
evidence to support this in ancient
Greek history dating back as early as
500 BC there were two main theories for
the shape of the world, Homer advocated
that the earth was a flat disk and
Pythagoras believed that the earth was
spherical since that was the most
perfect shape
the latter was more favoured by the
ancient Greeks and the two early
arguments for this were that firstly the
eclipses of the moon shadow were
circular shadows and secondly Polaris
the North Star is always seen lower in
the horizon the more south you walk
which is really hard to explain with a
flat earth at around 300 BCE
Eratosthenes measured the circumference
of the earth he knew that on the day of
the summer solstice at exactly midday
that the Sun would be directly overhead
in the city of Syene it would not cast a
shadow he also knew that the city of
Alexandria which was directly
north of Syene and separated by a
distance of 800 kilometers that the Sun
in Alexandria at midday on summer
solstice was not directly overhead by
measuring the angle of the Sun in
Alexandria from the zenith point the
point directly overhead Eratosthenes was
able to calculate the circumference of
the earth using knowledge about spheres
the angle that he measured was seven
degrees or about one fiftieth of a
circle this corresponds to 800
kilometres so for a full circle we do
50 times 800 which is about 40 thousand
kilometres today we know that the
Earth's circumference is 40 thousand and
75 kilometres so he was incredibly close
Another easy way that we can prove the
earth is spherical is to use our
knowledge of triangles on surfaces with
different curvatures if the earth is
flat then it has zero curvature that
means if you draw a equilateral triangle
over large distances the sum of the
angles of the triangle will be a hundred
and eighty degrees if the earth has
positive curvature like a sphere does
then if you draw an equilateral triangle
on it you'll see that the angles of the
triangles sum to larger than 180 degrees
and if you have an earth who has
negative curvature for example it might
be saddle-shaped then the angles will
sum to less than 180 degrees to test
this you could walk off fly a few
hundred kilometres turn 60 degrees
travel the same distance turn 60 degrees
again travel the same distance again and
you'll find that you won't end up in the
place that you started out at this is
because the earth is spherical to be
honest I still have no idea why some
people can genuinely believe that the
earth is flat given all the evidence
however I hope I've managed to convince
you that it's not or even better if you
weren't a flat earther to begin with I
hope you enjoyed this video as usual if
you enjoyed the video
please
it would mean so much to me if you could
leave me a like share and subscribe
