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movie-previews-are-called-trailers-because-they
Movie previews are called ‘trailers’ because they used to ‘trail’ at the end of a film. Because cliffhanger endings were so popular in the 1910s, trailers were shown after the films in order to tease the next movie in the series.
scientists-created-the-first-cloned-horse-by
Scientists created the first cloned horse by implanting a mare with an embryo containing her own DNA. After successfully carrying it to term, the big day arrived, and the mare literally gave birth to her own twin.