Cats are cute, furry, cuddly — and an invasive alien species. The Poland Academy of Sciences made this determination in July, and the U.S. should follow suit.

Marta, a Mississippi alligator born in 1930, is recognized as the oldest living creature in European zoos. She resides at the Płock Zoo, located in central Poland, about 60 miles west of Warsaw.

What makes a plant or animal invasive — and who's to blame? : Short Wave At first glance, the whole narrative of aquatic invasive species may seem straightforward: A bad non-native species comes ...