Horizon
Season 16 Episode 3 - The Keys of Paradise
7.4 ?
1964
Documentary
Horizon follows the discovery of a chemical in the brain which has morphine-like properties.
Episodes in Season 16
1
The Forever Fuel
60 min
2
In Search of Pegasus
60 min
3
The Keys of Paradise
60 min
NOW PLAYING
4
Sweet Solutions
60 min
5
Bronze Age Blast-Off
60 min
6
The Real Bionic Man
60 min
7
A Mediterranean Prospect
60 min
8
Elements of Risk
60 min
9
Mr. Ludwig's Tropical Dreamland
60 min
10
Where Nothing Happens Twice
60 min
11
Journey Through the Human Body
60 min
12
The Fight to Be Male
60 min
13
The Robots Are Coming
60 min
14
Mexican Oil Dance
60 min
15
Tracks on the Oregon Trail
60 min
16
The Race to Reshape Cars
60 min
17
Dragnet for Diabetes
60 min
18
The Lost Waters of the Nile
60 min
19
Survival of the Fastest
60 min
20
A Touch of Sensitivity
60 min
21
A Treasury of Trees
60 min
22
Darkness Visible
60 min
23
Uranium Goes Critical
60 min
24
The Fat in the Fire
60 min
25
Decade
60 min
