Sponsored by seriously digital entertainment

and their mobile game, Best Fiends

Beiefly before the main portion of the video begins

In about 45 seconds,

I'd like to thank my incredible

sponsor. Their game is about a meteorite

that crashes into a fictional planet

that apparently transforms it into a

free puzzle adventure game where you can

collect and upgrade little characters by

matching the same colored objects to

just meet virtual slugs, in the real world

meteorite impacts often caused nothing

but mass destruction and chaos with

maybe a few extinction events. But in

this virtual world it's actually created

a pretty fun game with some character

question where you can win virtual

prices like gold and hopefully not going extinct there's quests every 50

levels and you can play competitively

against your also not extinct friends

on Facebook through their leaderboards

I'm on there at level 32 so if you're the

type of person that has to be better

then you can download the game for free

with the link in the description and if

you actually play it to level 10 they will

throw some free virtual golden diamonds

your way that's apparently were four

dollars and ninety-nine cents if you

skip the video until now that you should

feel just a tiny bit bad about yourself

but the main portion of the video begins

now anyway regardless so here's an

interesting question how many times has

the earth been struck by an asteroid

when you look at the moon or planet like

mercury you can tell right away that

they've been impacted a lot because you

can physically count hundreds of craters

on the surface but this isn't really the

case with her perfectly preserved impact

craters are rare or blended extremely

well with the environment here and it's

not because the earth has been impacted

any less it's because our thought

processes like erosion and tectonic

activity that the moon and mercury don't

the earth has likely been hit by

asteroids just as many times as the moon

or mercury in the past but how many

times have humans actually witnessed an

event like this happening to start with

the earth is likely already been hit

several times today and maybe getting

hit right now while you're watching this

video by extremely small pieces of rocks

called meteoroids which can range in

size from a grain of sand up to a one

meter wide object about 15,000 tons of

objects of this size enter the Earth's

atmosphere every year and while most of

these don't reach the surface, the few

that do are called meteorites like this

one that hit somebody's house in the San

Francisco Bay Area back in 2012 or this

one that smashed through somebody's car

in illinois in 1938 but the larger

asteroid is the larger the damage that

is caused by it asteroid with a diameter

of four meters or about the size of an

elephant, hit the earth about once every

year on average while objects about

seven meters wide which can cause an

explosion similar scale to the atomic

bomb dropped on Hiroshima hit our planet

about every five years or so an event

the same scale of Hiroshima happening

every few years may seem like it would

be spectacularly obvious but they

generally go unnoticed because the

majority of the earth's surface is

covered in water a majority of the

Earth's landmass is still sparsely

populated and many of these objects

simply explode in the upper atmosphere

several impact events occur every year

without ever being witnessed by humans

between 1975 and 1992 for example

American missile early-warning

satellites detected 136 major explosions

in the upper atmosphere caused by

moderately sized air bursting meteors

this map here shows you the frequency of

air bursting meteors between one and twenty

meters in size between 1994 and 2013

which you can see are fairly common

event but what about the really scary

asteroids that could wipe out an entire

city or even all of human civilization

you may be asking. Well, asteroids about

20 meters wide about the size of a

six-story building hit the earth about

twice every 100 years and cause an

explosion of about 500 kiloton for about

30 times the scale of Hiroshima the last

one of these sighs events happened

fairly recently in 2013 over chelyabinsk

russia the asteroid remained undetected

by humanity until it entered the

atmosphere and weighed about the same as

the Eiffel Tower despite being just 20

metres wide

it was witnessed by thousands of people

before exploding 30 kilometers above the

ground which damaged 7200 buildings

across six different cities like this

one injured 1500 people severely enough

to visit a hospital and caused 30

million dollars in damage

coincidentally just 16 hours after this

meteor struck the earth another asteroid

that was fifty percent larger at 30

meters wide just barely missed the earth

at a distance of only twenty-seven

thousand seven hundred kilometers or

about the distance of two earths placed

side-by-side the asteroids were not

related to each other and had completely

different orbits but

not the first weird coincidence earth or

even humanity has had with near-miss

asteroids. On march 23rd 1989 an asteroid

300 meters wide about the same size as

this skyscraper in Dubai miss the earth

by just 700,000 kilometers and passed

through the exact same position that the

earth was in a mere six hours previously

had that asteroid been only six hours

early on its journey of millions of

years it would have impacted and cause

the largest explosion in all of recorded

history about 600 megatons or 12 times

the power of the Tsar Bomba, the largest

nuclear weapon ever detonated. The

largest meteor known to have actually

hit the earth during our recorded

history was probably the Tunguska event

which happened back in 1908. In that year

an asteroid somewhere between 60 meters

and 190 meters wide exploded just a few

kilometers above the remote wilderness

of Siberia. The power of the explosion

was somewhere between three and five

Megaton. comparable to a modern-day

hydrogen bomb. It is estimated that

eighteen million trees were destroyed by

the blast over an area about the size of

Rhode Island but because of the extreme

remoteness of Siberia especially in 1908

it's unknown if anybody actually died

from this event but the shockwave did

reportedly shatter windows and knock

people down up to hundreds of kilometers

away. An event like this is estimated to

happen only about every 1,200 years on

average but there are even larger

asteroids that have hit the earth in

prehistoric times that may hit us in the

future. Asteroids the size of one

kilometer appear to hit our planet about

once every four hundred forty-four

thousand years and release about 23,000

megatons, or 460 Tsar bombas. Larger

5-kilometer asteroid impact the earth

about once every 20 million years and

can create explosions equals a two-point

84 gigatonnes 450 6800 are bombas and

finally truly Titanic asteroids over 10

kilometers inside that are capable of

ending life on the planet strike the

earth very rarely the last known

instance of something this big hitting

our planet with 66 million years ago but

it did completely wipe out about 75%

of all living things on the planet

including the dinosaurs assuming that

these rates continue for the next

billion years there exists right now

about 2,000 asteroid larger than one

kilometer that will eventually strike

our planet but when and where exactly

may these apocalypse happened to answer

that question we must understand that

there are an estimated 14,000 asteroids

that are considered near-earth object,

meaning that their orbits come

relatively close to Earth at some point.

93% of these asteroids that are one

kilometer wide or larger are thought to

have been discovered which would leave

about 70 of these massive objects

remaining so far undetected in the

darkness. Of all the asteroids that have

been discovered 1651 are considered by

NASA to be potentially hazardous out of

which 157 are larger than one kilometer

but unless humanity is absurdly unlucky

our odds of being struck by any of these

in the near future is almost nil the

most likely impacted with an asteroid

160 meters wide which would be bad if it

happened but the odds are only one in

625 and it wouldn't even hit until

sometime between 2185 and 2198. Another

asteroid about four hundred ninety

meters wide which would be a lot worse

but has just a one in two thousand seven

hundred chance of hitting us around that

same time frame and the third most

likely on the list is a big one at one

point three kilometers wide but only has

a one in 8333 chance of hitting our

planet in the distant future of 2880 but

that's still a little better odds than

you winning an Academy Award sometime in

your lifetime and significantly better

than your odds of ever winning the

lottery in the very far just in future

about 1.35 million years from now the

star gliese 710 will pass a mere 77

light-days from the earth which is 20

times closer to us than the closest star

is today and it would severely mess up

our solar system by sending more

asteroids flying towards us from the

outer reaches of the solar system there

are over 2,000 huge asteroids waiting

for our planet in the distant future but

will humanity still be waiting around

for their arrival when they inevitably

come knocking

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