Captain+James+Cook+RN

 ** More than 30,000 years ago the population of the world was small, and people lived in family groups, hunting, fishing and food gathering. There were no cultivated crops, animals were not herded for food and metalworking was yet to be discovered. At that time, known as the last great Ice Age, Australia was joined to New Guinea. Islands such as Java and Borneo were larger than today, sea passages between them narrower. This made it possible for the ancestors of the people now called Australian Aboriginals to reach Australia from lands to the north. It is not known from where the Aboriginals began their journey, but it is certain that people with some kind of water craft crossed the 100 - 160 kilometres stretches of water between the islands to the north; and reach the southern continent. 
 * Aborigines And Their Culture