Cows are notorious for chewing their cud, but did you know this is actually a key part of their digestive process? This chewing of cud, also called “ruminating,” is one feature of an interesting and ...

THE endogenous fæcal excretion of calcium and magnesium is derived from the various digestive secretions and the desquamated epithelial cells of the alimentary tract. The relative proportions of these ...

Science, founded by Thomas A. Edison in 1880 and published by AAAS, today ranks as the world's largest circulation general science journal. Published 51 times a year, Science is renowned for its ...