The discovery of the 700,000-year-old humerus bone supports the idea that Homo floresiensis' ancestors rapidly evolved into a smaller species shortly after arriving on the remote island, showcasing island dwarfism in humans.
The study challenges previous notions as the concept of island dwarfism was not considered for humans before the discovery of Homo floresiensis, making it a surprising and exciting revelation.
The rapid evolution of Homo floresiensis into a smaller species upon arriving on the island of Flores is attributed to the island effect, where species adapt significantly to new island environments, possibly due to limited resources or fewer predators.
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