It's a small world after all. Interestingly, DNA from Aboriginal Australians suggests Australia experienced a wave of migration from India about 4,000 years ago.
http://www.australiangeographic.com.au/news/2013/01/aborigin...
Also Kon-Tiki https://en.wikipedia.org/wiki/Kon-Tiki_expedition
The dating method sounds very unreliable:
"The style of the art means it is at least 17,000 years old, but it could be up to 50,000 years old."
Art style? Yeah, right..... I call bull. Until carbon dated, I call this false.
If i draw something today in that style, it would not make it 50000 yrs old.
Here are two much more recent papers on the topic:
Nature http://www.nature.com/nature/journal/vnfv/ncurrent/full/natu...
Science http://www.sciencemag.org/content/349/6250/aab3884.abstract