The title of Spirit Animal’s exuberant mini-album, “Kingdom Phylum,” doesn’t seem to have been derived from any of the songs. Perhaps the D.C.-rooted New York musicians thought of ...

The animal kingdom is divided into different evolutionary lines. These include, among others, the protostomes ("mouth first") and deuterostomes ("second mouth").

Most of the animal forms we're familiar with date back to what's called the Cambrian, which started about 540 million years ago. But the earliest animals appear before that, in a period called the ...

That prompted me to ask what kinds of sexual differences predominate across the entire animal kingdom, and why.” Daphne Fairbairn[/caption] Fairbairn spent three years mining the available literature ...

By the Cambrian period, about 520 million years ago, the animal kingdom had branched into about 35 major groups, or phyla, each with its own distinctive body plan.

“The Animal Kingdom” begins with Daniel (Calvin Leon Smith), a soft-spoken psychotherapist, patiently coaxing Sam (Uly Schlesinger) into more-than-monosyllabic conversation.