Guam’s snake invasion began after WWII. Now DNA shows 19,000 changes

AI Summary

The brown tree snake, an invasive species introduced to Guam after World War II, has undergone approximately 19,000 DNA changes, revealing significant genetic flexibility. This adaptation explains their survival and high density on the island, providing insights challenging prior views on invasive species and inbreeding.

Brown tree snakes invaded Guam after World War II, causing ecological damage. These snakes now exist in extremely high densities across the island. New research reveals thousands of hidden DNA changes in the snakes. This genetic flexibility helps them adapt to new environments and survive. The findings challenge previous understandings of invasive species and inbreeding.