
Why is seawater salty? What causes volcanoes to erupt? Why don't man-made satellites fall from the sky? What makes people sleepy? Answers to these questions and more are in this animated title which explores topics of nature, customs, and technology.

1984-04-07

1984-04-14

1984-04-21

1984-04-28

1984-05-05

1984-05-12

1984-05-19

1984-05-26

1984-06-02

1984-06-09

1984-06-16

1984-06-23

1984-06-30

1984-07-07

1984-07-14

1984-07-21

1984-07-28

1984-08-18

1984-08-25

1984-09-01

1984-09-08

1984-09-15

1984-09-22

1984-09-29

1984-10-06

1984-10-13

1984-10-20

1984-10-27

1984-11-03

1984-11-10

1984-11-17

1984-11-24

1984-12-01

1984-12-08

1984-12-15

1984-12-22

1984-12-29

1985-01-05

1985-01-12

1985-01-19

1985-01-26

1985-02-02

1985-02-09

1985-02-16

1985-02-23

1985-03-02

1985-03-09

1985-03-16

1985-03-23

1985-03-30

1985-04-06

1985-04-13

1985-04-20

1985-04-27

1985-05-04

1985-05-11

1985-05-18

1985-05-25

1985-06-01

1985-06-08

1985-06-15

1985-06-22

1985-06-29

1985-07-06

1985-07-13

1985-07-20

1985-07-27

1985-08-03

1985-08-10

1985-08-17

1985-08-24

1985-08-31

1985-09-07

1985-09-14

1985-09-21

1985-09-28

1985-10-05

1985-10-12

1985-10-19

1985-10-26

1985-11-09

1985-11-16

1985-11-23

1985-11-30

1985-12-07

1985-12-14

1985-12-21

1985-12-28

1986-01-11

1986-01-18

1986-01-25

1986-02-01

1986-02-08

1986-02-15

1986-02-22

1986-03-01

1986-03-08

1986-03-15

1986-03-22

1986-03-29