Hundreds of thousands of feral camels roam Australia's outback. There are 700,000 at the latest count, doubling every 10 years.
They are shiftless descendants of the hard-working dromedaries brought over in the 19th century, before roads and railroads.
When their services were no longer required, they were let go into the desert, where they have thrived.
Now, these animals are raced for fun, slaughtered for their meat and thinned by hunters to rid the country of their vast numbers.
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