For centuries, naturalists have puzzled over what might constitute the head of starfish. When looking at a worm, or a fish, it’s clear which end is the...
Paleontologists have examined new microfossils of a Cambrian microscopic animal called Saccorhytus coronarius, which was previously interpreted as a deuterostome,...
A microscopic, bag-like marine creature that lived approximately 540 million years ago (Fortunian stage of the Cambrian period) has been identified from...
