Cattle turned out to graze various kinds of crop residue fields are a common sight when travelling around the northeastern corner of Colorado these days, a testament to the benefit of grazing for both ...

The presence of a crop in two Early Cretaceous birds points to an essentially modern digestive system that formed early in avian evolution. In modern birds the crop provides storage, allowing a number ...

This photo is of a specimen of the trilobite Palaeolenus lantenoisi from the Guanshan Biota in southern Yunnan Province, China. Rarely are internal organs preserved in fossils, but this specimen shows ...