Circadian Timeline
This timeline highlights significant dates in the evolution of circadian biophysics.
1893 – ARTIFICIAL LIGHT GOES PUBLIC
The 1893 World’s Columbian Exposition in Chicago is widely recognized as the landmark event that introduced large-scale artificial electric lighting to the public.
1959 – THE TERM “CIRCADIAN” IS NAMED
Franz Halberg coined the term “circadian,” from the Latin circa (“about”) and dies (“day”), to describe self-sustained biological oscillations.
1986 – THE ORIGINS OF CIRCADIAN MEAL TIMING
French physician Alain Delabos introduced the idea that eating patterns should align with natural circadian rhythms, favoring larger meals earlier in the day and smaller, lighter meals in the evening.
1983 – THE OVERCOMING JETLAG GUIDE
Charles Ehert’s guide Overcoming Jetlag was published as a practical resource on managing light exposure, diet, and meal timing to help travelers adjust more quickly to new time zones.
1994 – LEPTIN IS DISCOVERED
Leptin, the hormone produced by fat cells that regulates food intake and energy expenditure, was discovered in 1994 at Rockefeller University.
2000 – THE CIRCADIAN PRESCRIPTION
Sydney MacDonald Baker’s book Circadian Prescription was published as a health guide outlining a ten-point diet and lifestyle program designed to align daily routines with the body’s internal biological clock.
2012 – DR. KRUSE BANNED TED TALK
Dr. Jack Kruse delivered his banned TED Talk in Nashville, centered on light, water, and magnetism as the “three-legged stool” of human health. The talk was not officially released through TED’s mainstream channels because of its controversial nature.
2012 – DR. KRUSE REMOVED FROM LOW-CARB CRUISE
On May 6, 2012, Dr. Jack Kruse, who was scheduled to speak on Jimmy Moore’s 5th Annual Low-Carb Cruise, was removed from the ship after a fake tweet from an impostor account falsely claimed he was carrying a vial of Legionnaires’ disease.
2013: DR. JACK KRUSE PUBLISHES EPI-PALEO RX
Dr. Jack Kruse’s book Epi-Paleo Rx: The Prescription for Disease Reversal and Optimal Health was published in March 2013.
2017: THE NOBEL PRIZE FOR CIRCADIAN BIOLOGY
The Nobel Prize in Physiology or Medicine was awarded to American researchers Jeffrey C. Hall, Michael Rosbash, and Michael W. Young for discovering the molecular mechanisms that govern circadian rhythms, revealing how biological clocks synchronize with Earth’s 24-hour day–night cycle.
2023 – RICK RUBIN PODCAST WITH DR. KRUSE & ANDREW HUBERMAN
The release of Rick Rubin’s Tetragrammaton podcast featuring Dr. Jack Kruse and Andrew Huberman brought Dr. Kruse’s circadian biology research to a broader mainstream audience.
2026 – DR. KRUSE DISCUSSES MAGNETIC DECLINATION
On April 9, 2026, Dr. Jack Kruse discussed magnetic declination in an interview; later coverage by a news program sensationalized his remarks, prompting clarification in subsequent interviews.