A prickly invasion
The act of nurturing a single pot plant would appear to be a fairly benign activity. However, when Navy surgeon, Dr William Bell Carlyle, entrusted a prickly pear cutting to the care and protection of his servant, Mary Sutton, no one could have predicted the devastation which would result. In a period of less than 100 years the prickly pear multiplied and occupied over 60 million acres of Queensland and New South...