MADAGASCAR - Why does Madagascar have so many unique animals?

Here's another interesting article at Mongabay.com on a new theory which could go someway to explaining the extraordinary richness of Madagascar's flora and fauna.

Scientists have long been puzzled by Madagascar's extraordinary levels of biological diversity, but now an international team of researchers has developed an climate change-based explanation for why the island has such a richness of animal life. They say that their research will help prioritize conservation efforts in the last remaining natural habitats of Madagascar.