Why Male & Female Fight | Battle of the Sexes in the Animal World | BBC Earth

BBC wildlife show 'Battle of the Sexes in the Animal World' explain the ancient biological reasons for the ongoing fights between the male and female of every species on Earth. Visit http://www.bbcearth.com for all the latest animal news and wildlife videos and watch more high quality videos on the new BBC Earth YouTube channel here: http://www.youtube.com/bbcearth