Unlimited Horizons

November 8, 1940 to July 4, 1943
92 episodes known to exist
Unlimited Horizons was a radio show which ran from November 8, 1940 to July 4, 1943.
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Runs
Radio series often ran for multiple seasons and/or through many incarnations with different radio networks, sponsors, cast/crew, and revivals after many years.
#
Dates
Show
# Episodes (Known)
Network
1
November 8, 1940 - April 22, 1941
Unlimited Horizons
25
-
2
December 19, 1941 - July 20, 1942
Unlimited Horizons
30
-
3
October 4, 1942 - July 4, 1943
Unlimited Horizons
37
-
Unlimited Horizons
November 8, 1940 - April 22, 1941
25 episodes known to exist
Producer: Arnold Marquis
#
Air Date
Title
Comments
Length
Sources
November 8, 1940 
The Receding Horizons of Astronomy 
 
29:45 

 
November 15, 1940 
The Story of the Klystron 
 
29:39 

 
November 22, 1940 
The Story of Life On Earth 
Technical difficulties delayed the beginning of the Show for 2 minutes 
28:59 

 
November 29, 1940 
New Methods of Studying Plant Growth 
 
29:38 

 
December 6, 1940 
The Unexplored Field of Vibration 
The Study of Earthquakes 
29:54 

 
December 13, 1940 
Benefits of Modern Acoustics 
The Science of Sound 
29:54 

 
December 20, 1940 
Wings For War and Peace 
The history of Aviation 
29:52 

 
December 27, 1940 
The Salmon Savers 
 
29:51 

 
January 3, 1941 
Building by Breaking 
Stress Testing 
29:57 

 
10 
January 10, 1941 
The Story of Cosmic Rays 
 
29:49 

 
11 
January 17, 1941 
Millions to Burn 
The Story of Electricity 
29:51 

 
12 
January 24, 1941 
The Story of the Cyclotron 
Smashing Atoms With The Cyclotron 
29:59 

 
13 
January 31, 1941 
A Billion Years Ago 
The Grand Canyon 
29:43 

 
14 
February 7, 1941 
Immortality On Earth 
The Mystery of Life 
29:52 

 
15 
February 14, 1941 
Taking History From Bricks 
 
29:53 

 
16 
February 21, 1941 
Pumping Life 
Mechanical Engineering 
29:51 

 
17 
February 28, 1941 
Man's New Cleansers 
 
29:44 

 
18 
March 7, 1941 
Neither Living Nor Dead 
Suspended Animation 
29:54 

 
19 
March 14, 1941 
The New Nutrition 
Biochemistry - Vitamins 
29:34 

 
20 
March 18, 1941 
Science's Listening Posts 
Shortwave Radio. Changes from 30 to 25 minute format at this point. 
24:49 

 
21 
March 25, 1941 
Warring with Insects 
Man outnumbered by insects. Includes five minutes of news at the end. 
24:44 

 
22 
April 1, 1941 
The Structure of Molecules 
 
25:00 

 
23 
April 8, 1941 
Air Power Plus 
 
25:00 

 
24 
April 15, 1941 
Sea-Going Laboratory 
 
25:00 

 
25 
April 22, 1941 
Science, Bane Or Blessing 
 
25:00 

 
Unlimited Horizons
December 19, 1941 - July 20, 1942
30 episodes known to exist
#
Air Date
Title
Comments
Length
Sources
December 19, 1941 
The 200 Inch Telescope On Palomar Mountain 
First Show in the Second Series. Back to a 30 minute format 
29:37 

 
December 26, 1941 
Engineering Keeps Them Flying 
The story of Men and Machine. Show is mistakenly announced as the First in the second series. 
29:39 

 
January 2, 1942 
Improving the Perfect Food 
The story of Milk 
29:54 

 
January 9, 1942 
Science Brings Yesterday to Today 
Going Back To The Ice Age. 
30:00 

 
January 16, 1942 
Science Battles Poliomyelitis 
 
29:58 

 
January 23, 1942 
When All Men Were Children 
Science studies Ancient Peruvian Civilization. Announcement at end states Our next programs will be February 6th 
29:59 

 
February 6, 1942 
Electron Microscope 
Program of 1-30 Preempted 
29:59 

 
February 13, 1942 
Life Before History Began 
 
29:56 

 
February 20, 1942 
Muddy Flows 
The Movement of Flowing Waters 
29:49 

 
10 
February 27, 1942 
What Job You Are Fitted For 
Vocational Research 
29:58 

 
11 
March 6, 1942 
The Isolation of Botulism 
 
29:47 

 
12 
March 13, 1942 
Metal to Build a Bulwark of Civilization 
New Deposits of Metal for War and Peace 
29:58 

 
13 
March 20, 1942 
Immunity to Order 
 
29:51 

 
14 
March 27, 1942 
Magnesium Hunters 
 
29:55 

 
15 
April 3, 1942 
Repairing the World's Oldest Telegraph System 
Advances in Neurological Surgery 
29:57 

 
16 
April 13, 1942 
The Pulse of the Earth 
The Story of Seismology and Earthquakes. Day change announced at end of previous show 
29:54 

 
17 
April 20, 1942 
Rediscovered Minds 
 
30:00 

 
18 
April 27, 1942 
?? Title Unknown ?? 
 
30:00 

 
19 
May 4, 1942 
Outwitting Age with Vitamins 
 
29:55 

 
20 
May 11, 1942 
Are Acquired Characteristics Hereditary 
 
30:00 

 
21 
May 18, 1942 
American Scene, 10,000 Years Before Christ 
 
29:53 

 
22 
May 25, 1942 
What Makes a Genius Tick 
Terman's Gifted Children 
30:00 

 
23 
June 1, 1942 
Science Turns Detective 
 
29:56 

 
24 
June 8, 1942 
Science Writes a Postscript to a Million-Year-Old Story 
Yosemite Valley 
30:00 

 
25 
June 15, 1942 
Grand Coulee Dam 
 
30:00 

 
26 
June 22, 1942 
Questing For Copper 
 
30:00 

 
27 
June 29, 1942 
Fighting the Red Water Death 
 
30:00 

 
28 
July 6, 1942 
Science Explores Adolescence 
 
29:47 

 
29 
July 13, 1942 
Searching For Secrets with Surgery 
 
29:45 

 
30 
July 20, 1942 
Science Finds a Cinderella 
Rubber Tree. Final program of the second series. 
29:54 

 
Unlimited Horizons
October 4, 1942 - July 4, 1943
37 episodes known to exist
#
Air Date
Title
Comments
Length
Sources
October 4, 1942 
X-Raying the Earth 
 
30:00 

 
October 11, 1942 
>fighting Man's Unseen Enemies 
 
30:00 

 
November 8, 1942 
Reading the Past Through Tree Rings 
There were no programs the previous three weeks because of the death of Arnold Marquis's young son 
30:00 

 
November 15, 1942 
The Autobiography of the Earth 
 
30:00 

 
November 22, 1942 
Weather Prophets Go to War 
 
30:00 

 
November 29, 1942 
The Brain Talks For Itself 
 
29:43 

 
December 6, 1942 
?? Title Unknown ?? 
 
30:00 

 
December 13, 1942 
Fatigue--The Insidious Enemy of Metals 
 
30:00 

 
December 20, 1942 
The Age of Volcanos 
 
30:00 

 
10 
December 27, 1942 
?? Title Unknown ?? 
 
30:00 

 
11 
January 3, 1943 
The Indispensable Pest 
 
30:00 

 
12 
January 10, 1943 
Fighting a Killer with a Killer 
 
30:00 

 
13 
January 17, 1943 
A Tiny Lamp, Brighter Than the Sun 
 
30:00 

 
14 
January 24, 1943 
Tracing the Deadly Virus 
 
30:00 

 
15 
January 31, 1943 
Slow Poison 
 
30:00 

 
16 
February 7, 1943 
Water Is Life 
 
30:00 

 
17 
February 14, 1943 
Taming the Underground For War 
 
30:00 

 
18 
February 21, 1943 
Mysterious Amino Acids 
 
30:00 

 
19 
February 28, 1943 
The Atom Smasher Turns Doctor 
 
30:00 

 
20 
March 7, 1943 
Fighting the Fly 
 
30:00 

 
21 
March 14, 1943 
Unmasking Death On the Range 
 
30:00 

 
22 
March 21, 1943 
The Great Basin 
 
30:00 

 
23 
March 28, 1943 
Wanted--A Substitute For Blood 
 
30:00 

 
24 
April 4, 1943 
Muscles For Victory 
 
30:00 

 
25 
April 11, 1943 
Wonders Under a Microscope 
The story of the Microscopic World. 
30:00 

 
26 
April 18, 1943 
Search For a Better World 
 
30:00 

 
27 
April 25, 1943 
A Native Egyptian Turns American 
 
30:00 

 
28 
May 2, 1943 
Our Dying Cities 
 
30:00 

 
29 
May 9, 1943 
A Tool to Explore the Cosmos 
 
30:00 

 
30 
May 16, 1943 
California Trail Blazer 
The story of Juan Bautista De Anza, first White to reach California by Overland Trail. 
30:00 

 
31 
May 23, 1943 
The Deadliest Weapon 
 
30:00 

 
32 
May 30, 1943 
The Scourge of the Pea Weevil 
 
30:00 

 
33 
June 6, 1943 
Dehydration--The Magnificent Outcast 
 
30:00 

 
34 
June 13, 1943 
New World For the Color-Blind 
 
30:00 

 
35 
June 20, 1943 
Rediscovering Our Buried Treasure 
 
30:00 
36 
June 27, 1943 
A Bathysphere On Land 
 
30:00 

 
37 
July 4, 1943 
Science Fashions the Kitchen of the Future 
 
30:00 
References