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Fact of the Day
The cryptochromes in coral are what make it possible for the organism to time its breeding by the rhythm of the moon. What the cryptochromes do is detect the blue light emitted by the moon. This gene developed in sightless simple life hundreds of millions of years ago. This would also illustrate the common ancestor shared between humans and coral. In the human body, this gene is part of the system that makes what we call our biological clock or circadian rhythm. This is what you feel when trying to go to bed as the sun is coming up or wake up in the dark of night for that matter. Our eyes detect the sun light and our cryptochromes know when the moon is overhead and possibly when it is full [source] [source].
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