Moving from Africa to Asia or to Europe beck then was easy as there were land bridges between North Africa & Spain and another near Egypt. But sailing from South Asia to Australia was a difficult task.
Global warming
So they walked on mostly ice bridges from Africa to Australia? Really??
Yes
They were not ice bridges. It was a lower sea le
Okay, very plausible
Aborigines are not african. Not everyone with a dark skin is african just like not all pale skinned people are caucasian. Sri lankans and bangladeshi have dark skin but are asian while aborigines are dark skinned and oceanic.
Skin colour is determined by the amount of melanin in the skin with people living close to the equator having more melanin to protect the skin against the harmful sun rays. That is why south indians, sri lankans, bangladeshi, arborigines are dark even though they are not africans. People of southern Italy, greeks etc also have darker skin than other europeans because they are nearer the equator.
Sri lankans
Bangladeshi
South Indians
Aboriginal people.
.
Their DNA is African
Europeans and arabs also have african dna. All humans share some DNA.
https://www.sciencedaily.com/releases/2011/05/110524153536.htm
I would love to hear how that crossing happened, from Asia to the America’s
Annunaki airlines 
The challenge isn’t in the Distance, it’s in the climate, that area is amongst the coldest places on earth.
The distance between asia (papua new guinea) and australia is only 150km and the region is full of islands in between. So hopping from one island to another was very easy.
Civilizations come and go. Akili ya kutengeneza meli haikuanza juzi. I think there is a way the Earth resets itself, it is still evolving. 80k years sio juzi. I’m thinking if Jesus was here 2k years ago, then it’s like a second. We have to wait for another million years for God(supreme being) to shake up things.
All in all, the impossibility is possible. The Aboriginals had means to migrate.
During Winter Russia & Alaska are connected via an ice bridge. Russia is in both Europe and Asia and both of these were connected to Africa in Southern Spain and also in Norther Egypt
Kizee, we are talking about frozen land, with double digits minus temperatures and gusting winds. Also keep in mind these were hunters and gatherers.
Then we ask the question, what was the incentive hunters and gatherers venturing in such an excursion ?
Some reading there for you , Kijana … 
What we call Homo sapiens gradually began to emerge, most likely from Heidelbergensis ancestors within the rich territories of Africa, in either Africa’s southern or eastern reaches, by at least 200,000 years ago.
From Africa, members of the branch that is related to us modern humans formed migrated away from their homelands and into the Near East, where Homo sapiens burials have been uncovered at the sites of Skhul and Qafzeh in Israel, dated to between 90,000 and a staggering 130,000 years old, respectively.
Similarly, the site of Jebel Faya in the United Arab Emirates seems to show through the tools that were found there that Homo sapiens may have migrated here as early as 130,000 years ago, too. Even older migrations are not exactly unlikely, either, as fossils that appear to be Homo sapiens (although some alternatives have been suggested, too) found at Misliya Cave in Israel were recently found and dated to c. 180,000 years ago.
Far from there being one, singular big migration of one species to far-flung areas – which does not really make sense if you think about it, anyway – there appear to have been multiple instances of adventurous people moving about.
A recent study has shown that some of these early adventurers made it all the way to the island of Sumatra in western Indonesia between 73,000 and 63,000 years ago; this ties in well with other evidence that hints at humans reaching inner Southeast Asia some time before 60,000 years ago, and then following the retreating glaciers up towards the north.
There is even new evidence that places humans in the north of Australia by 65,000 years ago, seemingly also stemming from an early migration.
I blame slavery and Christopher Columbus
Africans also went to South America centuries before Christopher Columbus
Every black man is an African. Rise up Jah children. Emancipate yourself from mental slavery. Black man is in chains everywhere.
