How Does Light Impact Horses?
Many of us already know that exposing mares to artificial light advances the breeding season, allowing foals to be born earlier in the year. But do you know how or why it works? And did you know that artificial light impacts more than just breeding?

Light—naturally derived from the sun—drives the internal clocks of all organisms on earth. Those clocks regulate all aspects of physiology and give rise to circadian (24-hour) rhythms in almost all of our behavioral, physical, and biochemical processes. Physical activity, body temperature, heart rate, blood pressure, hormone levels, sleepiness, and more all undergo rhythmic undulations over the 24-hour period in response external cues, i

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