Roller Coaster; Quicksand; Jelly-Side Down; Lemons; White Tiger (S7E1)
10/14/1989
Bee Stings; Bowling; High-Speed Elevator; Lemons; Boa (S7E2)
10/21/1989
Race Cars; Spider Webs; Lemons; Tropical Fish (S7E3)
10/28/1989
Rain Forest; Buoyancy; Pouring Catsup; Lemons; Cold Remedies (S7E4)
11/4/1989
Caffeine; Butterfly Migration; Autumn Leaves; Lemons; Doppler Effect; Sloth (S7E5)
11/11/1989
Surfing; Geothermal/Volcanoes; Luau; Sugar Processing; Hawaiian Language; Eel (S7E6)
11/18/1989
Whale Watch; Sunspots; Lemons; Skunk (S7E7)
11/25/1989
Milky Way; Epilepsy; Lemons; Inventors Fair; Cuttlefish (S7E8)
12/2/1989
DNA; Rube Goldberg Contest; Parrot Chat; Chewing Tin Foil; Seahorse (S7E9)
12/9/1989
Marathons; Celestial Navigation; Cataracts Chat; Lemons; Echidna (S7E10)
12/16/1989
Spinal Cord; Glue; Lemons; Dog Behavior (S7E11)
12/23/1989
Cheese; Aging; Appendix Chat; Wolves (S7E12)
12/30/1989
Supercomputer; Greenhouse Effect; House Creaking; Owl (S7E13)
1/6/1990
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