How did humans make their first appearance in Australia?

Hello everyone, I am from Uruguay. My name is Saul. I have a doubt about your origins. You people from Australia, how do the first ancestors get into that Island? The country of Australia is in the middle of a huge ocean so, centuries ago there were no people in the country, when people started to migrate to other regions they walked. So how those people cross the ocean to get into Australia?

R@$T@POET:
Australia started being inhabited by cast out criminals from Britain.
Watch the movie Escape From L.A. starring Kurt Russell....it's pretty much like that.

PurpleRain:
I think the Aborigines made Australia what it is now. I have no idea how they got there, probably using boats etc.

Charles K:
-- Human habitation of Australia is estimated to have begun between 42,000 and 48,000 years ago. These first Australians may have been ancestors of modern Indigenous Australians; they may have arrived via land bridges and short sea-crossings from what is now Southeast Asia. Most of these people were hunter-gatherers, with a complex oral culture and spiritual values based on reverence for the land and a belief in the Dreamtime. The Torres Strait Islanders, ethnically Melanesian, were originally horticulturalists & hunter-gatherers.

The first recorded European sighting of the Australian mainland was made by the Dutch navigator Willem Janszoon, who sighted the coast of Cape York Peninsula in 1606. During the 17th century, the Dutch charted the whole of the western and northern coastlines of what they called New Holland, but they made no attempt at settlement. In 1770, James Cook sailed along and mapped the east coast of Australia, which he named New South Wales and claimed for Great Britain. Cook's discoveries prepared the way for establishment of a new penal colony. The British Crown Colony of New South Wales began a settlement at Port Jackson by Captain Arthur Phillip on 26 January 1788. This date was later to become Australia's national day, Australia Day. Van Diemen's Land, now known as Tasmania, was settled in 1803 and became a separate colony in 1825. The United Kingdom formally claimed the western part of Australia in 1829.

Vince M:
I'n not sure that this event has yet occured.

big_buffalo:
Thy came from Asia across the land bridge that connected Asia to Austrailia, the east Indies used to be an isthmus not really an island chain. whats interesting about the Aboriginies that a lot of people fail or are unwilling to recognize is that they very much resemle Neandertal man short stout bodies sloping foreheads and broad short noses