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Alarm clock" gene explains wake-up function of biological clock - Salk Institute for Biological Studies
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LK-HOME Alarm Clock, Children's Digital Cartoon Alarm Clock, 12/24 Hour Mode Setting, Countdown And Snooze Function, 2 Groups of Alarms Can Be Set,Yellow : Amazon.co.uk: Home & Kitchen
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Woman on bed wake up stretching in bedroom with alarm clock at 6.00 a.m. morning. Biological Clock healthcare concept. | Edexec
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Human brain and alarm clock with copy space. Biological clock, thinking time concept Stock Photo - Alamy
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Your body has an internal clock that dictates when you eat, sleep and might have a heart attack – all based on time of day
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