<p>Fossils show exceptionally rare evidence of a cloacal vent&mdash;the slit that most vertebrates use to excrete, have sex and lay egg&mdash;which could shed light on the evolution of the orifice</p>
Fossilization is the process through which organic material is preserved in sedimentary rock, often resulting in the formation of fossils. This process can provide valuable insights into the biology and ecology of ancient organisms.
The cloacal vent is a multi-functional opening found in many vertebrates, used for excretion, reproduction, and laying eggs. It represents an important evolutionary adaptation that allows for the efficient use of bodily functions in a single orifice.