Help us preserve, scan and post more rare and endangered films on Patreon: https://www.patreon.com/PeriscopeFilm Join this channel to get access to perks: https://www.youtube.com/channel/UCddem5RlB3bQe99wyY49g0g/join Website: www.PeriscopeFilm.com One of the Moody Sermon from Science films hosted by Dr. Irwin A. Moon, "Mystery of 3 Clocks" (1955) explores the concept of internal “alarm clocks” by examining how both humans and elements of the natural world keep precise time. Drawing a theological conclusion, Moon contrasts the fixed dependability of chemicals with human free will, arguing that while humans can choose their actions, they cannot choose the consequences, framing obedience to divine law as the rational path and belief in God as the only route to life. 00:00 – Dr. Moon explains that humans possess an internal clock in the brain that keeps highly accurate time during sleep. 1:39 – Researchers review scientific background on sleep, explaining that scientists once looked for a “sleep center” in the brain but instead found an arousal center in the hypothalamus, suggesting humans are naturally asleep unless awakened. 2:50 – The narrator explains that the brain is an electrical device producing measurable electrical waves. Electrodes and an electroencephalograph (EEG) record brain activity during sleep and wakefulness. 5:00 – EEG tracings illustrate sleep vs. wake patterns, showing how noise, light, and sensory stimuli trigger the brain’s arousal center. Sensory connections make sleep safe by allowing rapid awakening. 6:21 – The need to determine whether humans can wake by habit or whether a true internal timekeeping device exists. Personal experience abroad supports the existence of a built-in biological clock. 7:58 – Experiments shows that people can accurately awaken at randomly assigned times, supporting the hypothesis of an internal mental timer. 9:11 – Researchers turn to the natural world and study cicadas as “living alarm clocks.” 9:48 – Cicadas appear suddenly at night in West Virginia, climbing upward and preparing for metamorphosis. 10:17 – The dramatic transformation from pupa to adult cicada. 12:36 – By morning, mature cicadas emerge and soon fill the woods with their loud, distinctive calls. 13:11 – How males produce sound using ribbed drum-like timbals and a resonating hollow abdomen. 15:03 – Female cicadas puncture branches with a highly engineered ovipositor to lay eggs in neat rows within the wood. 17:19 – After hatching, larvae drop to the ground and burrow to live underground for 17 years—the longest life cycle of any insect. 17:52 – Near the end of the 17-year cycle, nymphs dig upward and wait just below the surface until a precise internal cue prompts millions to emerge simultaneously. 18:35 – The cicada’s timekeeping ability far surpasses that of humans. 18:47 – Chemical demonstrations show that reactions can occur instantly or very slowly depending on the compounds involved. 18:49 Chemical demonstrations begin, showing how glycerin appears harmless but becomes dangerous when mixed to form nitroglycerin. 19:05 Some reactions occur without dramatic visible signs. 20:32 Moon explains that chemical reactions are predictable when conditions are known. 21:00 A starch–iodine test displays its signature deep blue color. 21:17 The experiment is modified to include “time” by delaying the reaction using iodic acid and sulfurous acid. 22:01 The delayed reaction occurs exactly at 17 seconds. 22:19 A second timed reaction is prepared to occur at 26 seconds, measured carefully. 22:56 A photoelectric relay stops the clock when the reaction triggers, confirming the exact 26-second delay. 23:24 Moon shifts to discussing internal “clocks” in nature, comparing human time sense, cicadas, and precise chemical reactions. 24:12 Chemicals are more dependable than humans because they fully obey “God’s laws,” unlike human will. 24:55 Humans have the ability to choose obedience or disobedience, unlike chemicals whose behavior is fixed. 25:27 Society sometimes treats disobedience as strength and submission as weakness. 26:00 A biblical voice is cited: doing the will of the one who sent him. 26:23 Another biblical warning: a path seeming right to man may end in death. 26:33 Moon claims humanity’s main problem is refusing to obey God’s laws. 27:01 A metaphor compares choosing between water and poison: one can choose the action but not the consequences. 27:24 Moon concludes that believing or rejecting God is a similar choice—outcomes are fixed by divine law, promising eternal life for believers and condemnation for non-believers. This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit http://www.PeriscopeFilm.com --- Source: https://www.youtube.com/watch?v=mX-YjbSH2Y4 Mirrored from Periscope Film (https://www.youtube.com/@PeriscopeFilm)