The tool-using hominins are believed to have been living on the island as recently as 50 000 years ago when homo sapiens roamed the Earth.
Findings show that some of the hobbits stood just over one metre tall.
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The discovery of a tiny arm bone suggests that an ancient human dubbed "hobbits" only shrank down to their diminutive size after they arrived on an Indonesian island a million years ago, scientists said on Tuesday.
Much about the pint-sized Homo floresiensis has been shrouded in mystery since the first fossils suggesting their existence were found on the island of Flores in 2003.
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