jueves, 31 de mayo de 2012

Tasmanian megafauna extinctions linked to humans

Analysis carried out at the Australian Nuclear Science and Technology Organisation (ANSTO) on the skeletal remains of extinct megafauna is providing substantial proof that for about 2,000 years they infact shared the island with early humans before suddenly disappearing some time before the last ice age.

The findings challenge for the first real time history's version of events and by now placing our ancestors in Tasmania at the same time as large prehistoric animals, like the Protemnodon anak (a giant wallaby), raises the chances we were involved in their extinction.

The climate change debate

Popular belief has centred on three likely scenarios for the mass extinction of the megafauna in the region: environmental causes related to climate change, which was considered the key cause of their extinction. Hyper-disease and human hunting have been a distant second in the debate.

Geological work on sea level change suggests humans could not have crossed Bass Strait until around 43,000 years ago when the island was temporarily connected by a land bridge to Australia. The vanishing of megafauna was thought to have occurred thousands of years preceding human arrival, clearing them from any involvement.

That is, of course, until now...
...
Source: ANSTO via The Archaeology News Network
Dr Gillespie and the research team’s extensive findings can be reviewed here: http://www.sciencedirect.com/science/article/pii/S027737911200025X

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