Why does heat make us sleepy? Fun facts in Polish Sign Language

Do you feel sleepy on a hot day? Want to know why this happens? See the explanation in Polish Sign Language.

Another video with various interesting information in Polish Sign Language. This episode was prepared for you by Jakub Mallik, and its title is: Why does the heat make us sleepy? We invite you to watch and comment. Video with subtitles translated automatically. Did you notice an error? Inform us.

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