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    While the age of plastic has brought convenience and cost-effectiveness.
    0:34

    While the age of plastic has brought convenience and cost-effectiveness.

     6.7K  views
    Plastic began to replace other materials,
    0:45

    Plastic began to replace other materials,

     5.65K  views
    From 1933, polyethylene became one of the most widely used plastics
    0:40

    From 1933, polyethylene became one of the most widely used plastics

     5.61K  views
    In the 1920s, researchers first commercially developed polystyrene.
    0:29

    In the 1920s, researchers first commercially developed polystyrene.

     5.6K  views
    In 1907 inventors began looking for a plastic alternative
    0:35

    In 1907 inventors began looking for a plastic alternative

     5.73K  views
    Plastic can mimic more expensive materials
    0:29

    Plastic can mimic more expensive materials

     5.71K  views
    In 1863 Hyatt invented celluloid
    0:25

    In 1863 Hyatt invented celluloid

     5.64K  views
    Plastic is everywhere in the world
    0:25

    Plastic is everywhere in the world

     5.64K  views
    Scientists have found a way to produce plastic on a large scale cheaply and quickly.
    0:36

    Scientists have found a way to produce plastic on a large scale cheaply and quickly.

     1  view
    The machine beat the champion for the first time in 1997
    0:23

    The machine beat the champion for the first time in 1997

     5.79K  views
    Chess gained new geopolitical importance after the 19th century
    0:26

    Chess gained new geopolitical importance after the 19th century

     5.7K  views
    The theory of chess was born
    0:29

    The theory of chess was born

     5.74K  views
    Chess was briefly phased out in France
    0:35

    Chess was briefly phased out in France

     5.69K  views
    It was in Europe that chess began to take its modern form
    0:30

    It was in Europe that chess began to take its modern form

     5.73K  views
    A safe square is called a castle
    0:33

    A safe square is called a castle

     5.79K  views
    Chess was introduced to the Arab world
    0:21

    Chess was introduced to the Arab world

     5.77K  views
    The game was originally known as chaturanga–
    0:22

    The game was originally known as chaturanga–

     5.72K  views
    There is a history of chess
    0:37

    There is a history of chess

     5.77K  views
    Chess has been around for 1,500 years
    0:35

    Chess has been around for 1,500 years

     5.81K  views
    From tooth mucus to Newtonian torsion, from crystallization to Schwann cells
    0:41

    From tooth mucus to Newtonian torsion, from crystallization to Schwann cells

     5.83K  views
    The two scientists studied the beginnings of the cell theory
    0:29

    The two scientists studied the beginnings of the cell theory

     5.81K  views
    Through the microscope, we find that every plant is made up of cells
    0:38

    Through the microscope, we find that every plant is made up of cells

     5.82K  views
    The cause of the tension between Hooke and Newton
    0:46

    The cause of the tension between Hooke and Newton

     5.75K  views
    Hooker invented the cell by looking at a cork under a microscope
    0:40

    Hooker invented the cell by looking at a cork under a microscope

     5.87K  views
    The bacteria are found by looking at the scratches on the teeth
    0:33

    The bacteria are found by looking at the scratches on the teeth

     5.82K  views
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