Sezon 21
Bölümler
1 Volcanoes / Hovercraft / Curve Balls / Windshear / Xerography 8 Eki 1980 2 Cystic Fibrosis / Whooping Crane / Cold-Water Survival 15 Eki 1980 3 Skin – The Bare Necessity / Manatees / Ludhiana 22 Eki 1980 4 Tar Wars 29 Eki 1980 5 Going Without Gas / Surface Tension / Science Fair 5 Kas 1980 6 China Now – Its Roots in the Past (Part 1 of 2) 12 Kas 1980 7 China Now – The Four Modernizations (Part 2 of 2) 19 Kas 1980 8 Success Story / Sickle Cell Anemia 26 Kas 1980 9 Freak Waves / Invisible Astronomy / Hildebrand 3 Ara 1980 10 Prenatal Diagnosis / Hearing in Chinchillas 10 Ara 1980 11 AAAS Report / One of the Family / Oyster Culture 7 Oca 1981 12 Birds' Eggs / Newfoundland Oil / John Polanyi 14 Oca 1981 13 Poisoned Playgrounds / Charlie 28 Oca 1981 14 The Moving Still 11 Şub 1981 15 Sri Lanka: Island of Serendib 18 Şub 1981 16 Blackfly / Desalination / Memory – Come to think of it / Dr. Karl Illmensee 11 Mar 1981 17 The Foxes' Earth 25 Mar 1981