Before humans, Australia was colonized by rats

Story highlights

  • A single pregnant female could have been the Founding Mother of Australia's rodents
  • Native Australian rodents make up the majority found in Australia
  • This evolution is of interest because of its potential for practical applications in medicine

(CNN)A single pregnant female, which traveled aboard a coconut palm for part of her journey from Asia, could have been the Founding Mother of Australia's rodents, one scientist suggests.

Most of the rats and rodents in Australia today are descendants of a single species that arrived from Asia in two waves, the first 6 million years ago and the second about a million years ago. Like