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Horizon - Season 23 Episode 15: Twice Five Plus the Wings of a Bird

1986-04-28

    Documentary

Horizon researches how we acquire mathematical abilities in the first place..

Season 23 Episodes

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1964
Episodes: 9

1964

1964-02-04
1965
Episodes: 24

1965

1965-01-06
1966
Episodes: 23

1966

1966-01-02
1967
Episodes: 23

1967

1967-01-17
1968
Episodes: 24

1968

1968-01-02
1969
Episodes: 37

1969

1969-01-02
1970
Episodes: 37

1970

1970-01-05
1971
Episodes: 32

1971

1971-01-04
1972
Episodes: 33

1972

1972-01-03
1973
Episodes: 32

1973

1973-01-04
1974
Episodes: 33

1974

1974-01-07
1975
Episodes: 26

1975

1975-01-20
1976
Episodes: 30

1976

1976-01-05
1977
Episodes: 23

1977

1977-01-07
1978
Episodes: 24

1978

1978-01-06
1979
Episodes: 25

1979

1979-02-26
1980
Episodes: 25

1980

1980-01-14
1981
Episodes: 27

1981

1981-01-05
1982
Episodes: 22

1982

1982-01-11
1983
Episodes: 24

1983

1983-01-10
1984
Episodes: 22

1984

1984-01-09
1985
Episodes: 16

1985

1985-01-07
1986
Episodes: 22

1986

1986-01-06
1987
Episodes: 22

1987

1987-01-05
1988
Episodes: 25

1988

1988-01-04
1989
Episodes: 20

1989

1989-01-09
1990
Episodes: 20

1990

1990-01-08
1991
Episodes: 23

1991

1991-01-07
1992
Episodes: 19

1992

1992-01-06
1993
Episodes: 21

1993

1993-01-04
1994
Episodes: 21

1994

1994-01-10
1995
Episodes: 20

1995

1995-01-09
1996
Episodes: 16

1996

1996-01-08
1997
Episodes: 15

1997

1997-02-27
1998
Episodes: 18

1998

1998-02-19
1999
Episodes: 14

1999

1999-01-28
2000
Episodes: 19

2000

2000-01-12
2001
Episodes: 11

2001

2001-01-25
2002
Episodes: 18

2002

2002-01-10
2003
Episodes: 19

2003

2003-01-09
2004
Episodes: 18

2004

2004-01-08
2005
Episodes: 20

2005

2005-01-13
2006
Episodes: 19

2006

2006-01-12
2007
Episodes: 9

2007

2007-03-13
2008
Episodes: 17

2008

2008-01-15
2009
Episodes: 18

2009

2009-01-26
2016
Episodes: 16

2016

2016-03-16
2017
Episodes: 15

2017

2017-01-19
2018
Episodes: 13

2018

2018-02-05
2019
Episodes: 6

2019

2019-01-23
2020
Episodes: 8

2020

2020-01-16
2021
Episodes: 4

2021

2021-01-04
2022
Episodes: 4

2022

2022-03-31
2024
Episodes: 1

2024

2024-07-22

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