Your body has an internal clock that dictates when you eat, sleep and might have a heart attack – all based on time of day

Your body has an internal clock that dictates when you eat, sleep and might have a heart attack – all based on time of day: Anyone who has suffered from jet lag or struggled after turning the clock forward or back an hour for daylight saving time knows all about what researchers call your biological clock, or circadian rhythm – the “master pacemaker” that synchronizes how your body responds to the passing of one day to the next.