Is a cow bigger than a horse?

yes, they are i think so!!!!!!

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The average woolly mammoth reached between 2.7 m (9 ft) and 3.2 m (10 ft). The average male African elephant reaches between 3.2 m (10 ft) to 4 m (13 ft). To answer your question, no, the African elephant is bigger than the woolly mammoth was.