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How this might relate to people will require further investigation. Mice and humans are physiologically alike, so a similar effect might be expected for people, but the fact that mice are nocturnal and humans diurnal is a serious complicating factor. It is true, though, that the spread of electric lighting means many people eat their main meal when natural daylight is long gone—the obverse of a mouse eating during daylight hours. And that tendency to eat late, though it has never been tested properly, is believed by many nutritionists to be a factor in putting on weight.
When the full explanation for the modern epidemic of obesity has emerged, it is unlikely that the spread of artificial lighting will be the whole of it. But this work suggests it might be a part. When you eat could be as important as what you eat.

A. 어휘
investigation 연구, 조사. physiologically 생리학적으로, 생리적으로.
nocturnal 야행성의. diurnal 낮 동안의, 晝行性(주행성)의, 낮에 활동하는.
complicating factor 복잡한 요인. obverse 反面(반면), 한쪽, 裏面(이면), 앞면.
nutritionist 영양학자. epidemic 유행병, 유행. artificial lighting 인공조명.
When you eat could be as important as what you eat.〈언제 먹느냐는 무엇을 먹느냐 만큼 중요할 수도 있을 것이다.〉