What exactly is a species? Well, that depends on who you ask. Evolutionists struggle to define ���species��� because organisms won���t fit neatly into the classification system���and because species they think are separated by millions of years are often able to interbreed (for example, these amazing ant species I wrote about recently). So why are researchers saying they���ve confirmed a new otter species?

Scientists thought there was just one Neotropical river otter species living from northern...