Researchers now suspect night owls may be kept awake more by the artificial light in our homes, which may affect their eyes differently and disrupt signals to the brain telling them it is night-time.
研究人员现在怀疑夜猫子可能是因为家里的人工光线才保持清醒,这些人工光线会对夜猫子的眼睛产生特殊影响,扰乱大脑收到的信号,让大脑误以为夜晚还没到。
The experts do not yet know how genes for light recognition and caffeine metabolism differ in larks and owls.
专家还不知道早起者和夜猫子在光线识别和咖啡因代谢有关的基因方面存在怎样的差异。
But the differences they have found suggest night owls could be more strongly affected by caffeine, so it wakes them up more or lasts longer in their system, making them sleepy later on.
但是科学家发现的差异表明,夜猫子受咖啡因的影响更强烈,因此咖啡因能让他们清醒时间更长,在体内留存时间也更久,从而导致他们晚睡。
The findings show at least 13 percent of whether someone is a night owl or morning lark is inherited from their parents.
研究结果显示,一个人是夜猫子还是早起者,至少有13%是遗传自父母。
However the study found no link between night owl genes and obesity and type 2 diabetes, despite previous evidence.
然而,该研究没有发现夜猫子基因和肥胖以及2型糖尿病之间的关联,这与先前的证据不相符。
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