Because it's true.... there are lots of cases of miniature animals on islands. The Channel Islands off the coast of California, for example, were home to a miniature species of 4 foot tall mammoths, called the Pygmy Mammoth until just 12,000 years ago. Scientists thought that insular dwarfism and insular gigantism followed predictable rules. This study seems to indicate that maybe the situation is more complex.
George Carter claims to have found remnants of camp fires and charred bones where humans roasted those little guys.
13,000 year old Arlington Springs Man skeleton was found there too.
Hmmm, so how does all this explain all these monstrous Hawaiians at the gym? Feel like I am in a NFL weight room at times.
Whatever it is, they developed on an island in the opposite direction from miniaturization......
IANAB (...biologist), but I think it's more a matter of natural selection going weird in a situation of small sample size. That's why New Zealand, to take one example, got the three-eyed lizard, the six-foot earthworm that glows in the dark, and the alpine parrot that has an IQ higher than most politicians.