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Is There One All Powerful Superforce Controlling The Universe?

36m 20s4,870 字数986 segmentsEnglish

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0:02

our understanding of the universe

0:05

is a house of cards

0:08

built high upon a scaffold of

0:10

pre-existing theories

0:12

and tentative one-off results

0:15

and so most experiments in modern

0:17

theoretical cosmology

0:18

are not as they were in the early days

0:21

of physics

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they are not voyages of blind discovery

0:25

but rather

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finely tuned confirmations of

0:28

predictions already made

0:30

of results already hinted

0:34

the higgs boson was first predicted in

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1964

0:37

and finally confirmed in 2013

0:40

just as expected but what scientists

0:44

really hope for

0:45

are surprises a result that topples the

0:49

house of cards and builds a new one in

0:51

its place

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or totally cements the linkages and

0:55

proves the theories

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once and for all

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[Music]

0:59

and so in early 2021 in a laboratory

1:02

near chicago

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200 virtually assembled scientists

1:06

shared a gasp of excitement

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had just such a result the experiment

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and analysis was the culmination of more

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than 60 years work

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involving physicists from 35

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institutions in seven countries

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worldwide

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and yet until an envelope was opened in

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batavia illinois

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and a secretive key typed into a

1:25

computer not one of them

1:27

really knew what they had accomplished

1:29

this elaborate cloak and dagger approach

1:31

to experimental physics perhaps more

1:33

suited to a star-studded film festival

1:35

was necessary to avoid any one of the

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hundreds of collaborators inadvertently

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biasing their findings towards the

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desired outcome

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[Music]

1:46

this latest experiment at ferma lab was

1:49

concerned with the behavior

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of muons these exotic particles are the

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heavier cousins of the electrons

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and exist only for a couple of

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microseconds before decaying into

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something else

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like an electron a muon has electric

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charge and behaves like a spinning

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magnet

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but that spin wobbles when muons move

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through a magnetic field

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so using the incredibly complex

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mathematical tools of quantum mechanics

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and the so-called standard model of

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particle physics

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scientists have predicted exactly how

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much the muons

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should wobble this theoretical

2:23

prediction represents the sum

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of what we think we know about how the

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universe works

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and the elaborate experiment at ferma

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lab was designed to test

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this theory to find out if we

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are right

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[Music]

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to do this researchers spent four years

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installing and calibrating a huge

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c-shaped magnet some 15 meters in

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diameter with an impeccably uniform

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magnetic field

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for more than a year they spared muons

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around the magnet

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and measured their wobble

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[Music]

3:00

and sitting at the controls of this

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machine waiting

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for the beam to fire our researchers

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would have had plenty of time

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to contemplate the theoretical house of

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cards

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on which their predictions were built

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all matter in the universe from the

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muons inside the magnet

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to the researchers themselves is subject

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to four fundamental irreducible forces

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gravity keeps the scientist pinned to

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the seat of her chair

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keeps the huge magnet stuck to the

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surface of the earth

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and keeps the earth in orbit around the

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sun

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electromagnetism provides the invisible

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pull within the gigantic magnet

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but it does more than that it is

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responsible for the electric currents

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that flow through the equipment's

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controls

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and for the electrical impulses that

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spark through the scientist's body

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to keep her heart beating and her

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neurons firing

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shrinking down further to the scale of

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atoms themselves

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the strong nuclear force grips the

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particles together in every atomic

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nucleus

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holding them fast despite the repulsion

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of their like charges

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without this force not a single atom in

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her body

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the room or the entire universe could

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exist

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they would simply fly apart in a cloud

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of unconnected quarks

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and yet in a few thousand atoms inside

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the scientist's body

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the weak nuclear force is driving such

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elemental destruction

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the fourth fundamental force is the

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agent of radioactive decay

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which sees atomic nuclei like the

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potassium 40 inside our cells

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cracked open and transformed together

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the actions of the four fundamental

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forces gravity electromagnetism and the

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strong and weak nuclear forces are

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enough to describe

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every single phenomenon in the universe

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today

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except for it seems the wobble

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of muons the revelation unlocked with

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the opening of thermolab's envelope

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was that the intricate predictions built

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on these four forces for the muons

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were not in fact correct

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muons wobble more than they should and

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the results

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showed with unprecedented precision that

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there is likely

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to be something else at play a fifth

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force

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as yet undiscovered there is still much

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work to be done to understand the

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significance of this curious

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muon wobble but it gives us cause to

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re-examine what we think we know about

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the four

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fundamental forces that we are aware of

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our understanding of them too the result

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of centuries of scientific revelation

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why

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are they fundamental to the universe and

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are they really

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as distinct as we think how

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did the directionless quantum foam at

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the beginning of our universe give birth

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to these

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fundamental natural laws

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extending our house of cards back to the

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very

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birth of the cosmos we find

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that things looked very different for a

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brief moment

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of grand unification

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[Music]

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the existence of invisible forces at

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play in our universe

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has been recognized for thousands of

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years and mankind has strived to

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understand and harness them

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for almost as long load stones pieces of

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naturally magnetic rock

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were treasured and used for divination

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by the chinese since the second century

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ancient egyptians were wary of shocks

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from electric fish

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and early philosophers experimented with

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static electricity

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with rods of amber rubbed on cats fur

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but these strange phenomena graduated

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from mere curiosities

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in the 17th and 18th centuries as the

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scientific revolution

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forced them to yield their secrets they

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became the subject of rigorous study

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by scholars and statesmen alike founding

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father benjamin franklin reputedly sold

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all his possessions in order to fund his

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research

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