Chegada do homem à Austrália provocou extinção de espécies de maior porte

http://www.dailymail.co.uk/sciencetech/article-4141508/85-Australia-s-megafauna-went-extinct-45-000-years-ago.html
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"From 25-foot-long lizards to 2-ton wombats, more than 85% of Australia's large wildlife died out 45,000 years ago - and humans were to blame "
(...)
But researchers have found that shortly after humans arrived in Australia, more than 85 per cent of these 'megafauna' species went extinct.
The researchers suggest that humans may have hunted these animals to extinction - and even if humans killed one mammal per person per decade - it could have caused the extinction of a species in just a few hundred years.

A group of Australian megafauna species during the pleistocene era, drawn by Peter Trusler, an Australian palaeoaritst based at Monach University, Australia.




"According to the researchers, some of the megafauna that roamed Australia 50,000 years ago included 1,000 pound kangaroos, 2-ton wombats, 25-foot-long lizards, 400-pound flightless birds, 300-pound marsupial lions and Volkswagen-sized tortoises.
(...)
They used the sediment cores to help reconstruct what the climate and ecosystems were like in Australia at the time.
The sediment core is a type of time record of our planet - it contains chronological layers of sediment blown off from earth and into the ocean.

WHAT KINDS OF MEGAFAUNA WERE THERE?
Around 45,000 years ago, huge 'megafauna' species roamed around Australia.
But researchers have found that shortly after humans arrived in Australia, more than 85 per cent of these megafauna went extinct.
Some of these animals included:
•1,000 pound kangaroos.
•2-ton wombats.
•25-foot-long lizards.
•400-pound flightless birds.
•300-pound marsupial lion.
•Volkswagen-sized tortoises"