[count-your-change]

“These people, known as Homo erectus, had become stranded on the island and then had shrunk in an evolutionary response to the island's limited resources... “

Another just so story.

Then how to explain pygmies and the tallest people of Africa?

[SunkenCiv]

It means that genes pool up in isolation (geographical or social), and also means that the rules are the same for all.