People often have a hard time waking up when it’s cold out. Why? A study on fruit flies (果蠅) might answer the question.

我們?yōu)樯犊倳?huì)覺(jué)得在天冷的時(shí)候起床更困難了？這項(xiàng)關(guān)于果蠅的研究或許可以幫到你�。�你沒(méi)有聽(tīng)錯(cuò)，是果蠅）

The study found a “thermometer circuit (溫度計(jì)回路)” in fruit flies. It sends a message of coldness from their bodies to their brains. Through this circuit, coldness and darkness can stop parts of the flies’ brains from working, particularly (尤其) in the morning. These neurons (神經(jīng)元) work to wake up the fruit flies. So it’s hard for fruit flies to wake up in the cold winter. Researchers said this might happen to people, too.

研究發(fā)現(xiàn)，在果蠅體內(nèi)有個(gè)“溫度計(jì)回路”，它可以把“好冷”這個(gè)信息傳到大腦。通過(guò)這個(gè)溫度計(jì)回路的“傳話”，果蠅可以在寒冷黑暗的時(shí)候讓大腦部分區(qū)域停止工作，尤其是在早上。所以果蠅很難在寒冷的冬天醒來(lái)。研究人員表示，人類不想在寒冷的早上起床，也許也是同理！