N. spretella is sometimes still considered a distinct species, but most recent authors include it here.

A few recent authors speculate that they may have reached the coast of North America.

Considered a full species by some recent authors.

As mentioned, recent authors have added to the classical list.

He probably learned them not from Darwin's own writings, but from more recent authors.

However, recent authors have argued that a major cost to children comes long after: when they attempt to form stable marriages themselves.

Most recent authors, by contrast, said the agency had made only modest cuts.

Many recent authors use hegemony to describe America's relationship to the rest of the world.

Some recent authors break the tribe up into a dozen or so smaller tribes.

Most recent authors, however, have instead suggested a diet of small terrestrial vertebrates.