It is hypothesised that with the arrival of humans -LRB- around NUMBER@1 NUMBER@2 years ago -RRB- , hunting and the use of fire to manage their environment may have contributed to the extinction of the megafauna .

It is possible when humans came to LOCATION@1 -LRB- around NUMBER@1 NUMBER@2 years ago -RRB- , and began hunting and using fire , they may have caused the extinction of the megafauna .
