Scientists have used drunk hamsters to prove what we already know - that alcohol causes us to stay up later, sleep longer and stay less active throughout the day.
Boffins from Kent State University took a group of hamsters and split them into three groups, one which drank only water, one which drank a tiny bit of alcohol and one which drank more alcohol.
And of course, the results show that the hamsters which drank alcohol get hangovers like we do too.
A spokesperson for the study said: "People who drink alcohol, particularly late into the night, may not respond to important light cues to keep their biological clocks in sync with daylight over the next 24 hours.
"Even low levels of alcohol may impair the response to light cues."
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