Migrant histories

 作者:王职     |      日期:2019-03-08 07:18:06
RELATIONSHIPS between rats have shed light on the last human migrations to islands such as Tahiti and Samoa. Tracking early settlers by studying the genes of modern Polynesians is difficult, because recent migrations have made their genes similar. But the same does not apply to rats that reached islands on settlers’ boats. After analysing genetic differences between rats on various Polynesian islands, Elizabeth Matisoo-Smith at the University of Auckland concludes that there were multiple influxes of settlers to most islands (Proceedings of the National Academy of Sciences, vol 95,